Common Factors Calculator
Find all common factors of two numbers.
How It Works
Enter two positive integers. The tool finds their GCD, then lists all factors of that GCD, which are exactly the common factors of both numbers.
Formula
Common factors of A and B = factors of GCD(A, B).
Frequently Asked Questions
What are the common factors of 12 and 18?
GCD(12,18)=6. Factors of 6: 1, 2, 3, 6. So common factors are 1, 2, 3, 6.
Do coprime numbers have common factors?
Coprime numbers have only 1 as a common factor.