What are the common factors of 56 and 35?

To find common factors, find all the factors of each number. Then a common factor is any number that appears in both lists.

Factors of 56

1, 2, 4, 7, 8, 14, 28, 56

Factors of 35

1, 5, 7, 35

Therefore the common factors of 56 and 35 are 1 and 7.