The GCF is 2.
The common factors of 56 and 18 are 1 and 2.
The common factors of 18 and 20 are 1 and 2.
The common factors of 18 and 28 are 1 and 2
The common factors of 18 and 40 are: 1, 2.
Common factors of 18 and 32 are: 1 and 2.
The common factors of 18 and 64 are 1 and 2.
The common factors of 18 and 44 are 1 and 2.
The common factors of 14 and 18 are 1 and 2.
Factors of 18 are 1, 2, 3, 6, 9, and 18 Factors of 38 are 1, 2, 19, and 38 The common factors of 18 and 38 are 1 and 2.
The factors of 12 are 1, 2, 3, 4, 6, and 12The factors of 18 are 1, 2, 3, 6, 9, and 18The factors of 20 are 1, 2, 4, 5, 10, and 20The common factors of 12, 18 and 20 are 1 and 2The common factors of 12 and 18 are 1, 2, 3, and 6The common factors of 12 and 20 are 1, 2, and 4The common factors of 18 and 20 are 1 and 2The total number of factors for 12, 18 and 20 are all the same (6).
The common factors of 18 and 22 are: 1 and 2