This online calculator will help you to understand how to find Greatest common divisor (GCD) and least common multiple (LCM) of two numbers. GCD and LCM calculator is very quickly calculate the task and give a detailed solution.

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Guide

Some theory

GCD and LCM calculator

Least common multiple (LCM)

Greatest common divisor (GCD)

Guide how to enter data into GCD and LCM calculator

You can input only integer numbers in this online calculator.

Additional features of GCD and LCM calculator

Use and on keyboard to move to previous or next field.

Rules. Greatest common divisor (GCD) and least common multiple (LCM)

In arithmetic and number theory, the least common multiple(also called the lowest common multiple or smallest common multiple) of two integers a and b, usually denoted by LCM(a, b), is the smallest positive integer that is a multiple of both a and b. It is familiar from grade-school arithmetic as the "lowest common denominator" that must be determined before two fractions can be added.

In mathematics, the greatest common divisor (gcd), also known as the greatest common factor (gcf), or highest common factor (hcf), of two or more non-zero integers, is the largest positive integer that divides the numbers without a remainder.