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 common factors of 18 and 22 are: 1 and 2
The common factors of 16 and 18 are: 1 and 2