Greatest common divisor calculator
GCD(210, 20) = 2×5 = 10
210 = 2×3×5×7
20 = 22×5
GCD = 2×5 = 10
210 / 10 = 21
20 / 10 = 2
See divisors of numbers 10, 20, 210.
What is GCD?
The greatest common divisor (gcd/GCD), or the greatest common factor (gcf), or highest common factor (hcf), of two or more integers (at least one of which is not zero), is the largest positive integer that divides the numbers without a remainder.
Questions and word problems to GCD
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