What is a common factor of 32 64 and 76?

A common factor of 32, 64, and 76 is a number that divides evenly into all three of these numbers. To find the common factors, we can first find the prime factorization of each number. The prime factorization of 32 is 2^5, the prime factorization of 64 is 2^6, and the prime factorization of 76 is 2^2 * 19. The common factor among these three numbers is 2^2, which is 4.