### What are the common factors of 20 and 92?

A factor is a divisor - a number that will evenly divide into another number. One way to determine the common factors (and greatest common factor) is to find all the factors of the numbers and compare them. The factors of 20 are 1, 2, 4, 5, 10, and 20. The factors of 92 are 1, 2, 4, 23, 46, and 92. The common factors are 1, 2, and 4.