---
title: "Number Theory Calculators | XTRAW Tools"
description: "Number theory calculators for LCM, GCF, GCD, modulo, factors, prime factors, integer relationships, and divisibility."
url: "https://xtraw.com/tools/calculators/math-calculators/number-theory-calculators/by,ordering/dirDesc"
date: "2026-08-21T03:41:45+00:00"
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---

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 # Number Theory Calculators

#### Latest Tools

 [ ![Modulo Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-modulo-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/math-calculators/number-theory-calculators/modulo-calculator "Modulo Calculator")  new

## [Modulo Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2120&virtuemart_category_id=148&Itemid=175)

 Calculate the remainder after division using the modulo ...

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 [ ![Greatest Common Factor Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-greatest-common-factor-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/math-calculators/number-theory-calculators/greatest-common-factor-calculator "Greatest Common Factor Calculator")  new

## [Greatest Common Factor Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2119&virtuemart_category_id=148&Itemid=175)

 Calculate the greatest common factor of two or more ...

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 [ ![Least Common Multiple Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-least-common-multiple-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/math-calculators/number-theory-calculators/least-common-multiple-calculator "Least Common Multiple Calculator")  new

## [Least Common Multiple Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2118&virtuemart_category_id=148&Itemid=175)

 Calculate the least common multiple of two or more ...

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#### Products

 [ ![Combination & Permutation Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-combination-permutation-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/math-calculators/number-theory-calculators/combination-permutation-calculator "Combination & Permutation Calculator")   popular

## [Combination & Permutation Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2096&virtuemart_category_id=148&Itemid=175)

 Calculate combinations and permutations for counting ...

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 [ ![Simplify Fractions Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-simplify-fractions-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/math-calculators/number-theory-calculators/simplify-fractions-calculator "Simplify Fractions Calculator")   popular

## [Simplify Fractions Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2115&virtuemart_category_id=148&Itemid=175)

 Reduce fractions to simplest form. Use this free ...

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 [ ![Prime Number Checker from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-prime-number-checker-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/math-calculators/number-theory-calculators/prime-number-checker "Prime Number Checker")   popular

## [Prime Number Checker](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2116&virtuemart_category_id=148&Itemid=175)

 Check whether an integer is prime or composite. Use this ...

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 [ ![Prime Factorization Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-prime-factorization-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/math-calculators/number-theory-calculators/prime-factorization-calculator "Prime Factorization Calculator")  new

## [Prime Factorization Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2117&virtuemart_category_id=148&Itemid=175)

 Calculate the prime factorization of an integer. Use this ...

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 [ ![GCD & LCM Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-gcd-lcm-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/math-calculators/number-theory-calculators/gcd-lcm-calculator "GCD & LCM Calculator")  new

## [GCD & LCM Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2094&virtuemart_category_id=148&Itemid=175)

 Calculate greatest common divisor and least common multiple ...

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 [ ![Factorial Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-factorial-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/math-calculators/number-theory-calculators/factorial-calculator "Factorial Calculator")  new

## [Factorial Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2095&virtuemart_category_id=148&Itemid=175)

 Calculate the factorial of a nonnegative integer. Use this ...

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