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Common Factor Calculator

GCF & common factors

Frequently Asked Questions

What is a common factor?
A common factor divides every number in a set exactly. The greatest common factor (GCF) is the largest of these — for 24 and 36 the common factors are 1, 2, 3, 4, 6, 12 and the GCF is 12.


Find the greatest common factor and all common factors of several numbers.