Common factors of 42 and 56 are: 1, 2, 7, and 14.
Well, 1, 2, 7, 14 are common factors.
There is none, it continues to multiply and go on and on.
The common factors of 56 and 18 are 1 and 2.
The common factors of 38 and 56 are 1 and 2.
Since 28 is a factor of 56, all of the factors of 28 are common to 56.
The common factors of 52 and 56 are: 1, 2, and 4
The common factors of 12 and 56 are: 1, 2, and 4
The common factors of 63 and 56 are: 1, 7
Since 4 is a factor of 56, all of its factors are common.
The common factors of 34 and 56 are 1 and 2
The factors of 63 are 1,3,7,9,21, and 63 The factors of 56 are 1,2,4,7,8,14,28 and 56. The factors that are shared are 1 and 7. So the common factors of 63 and 56 are 1 and 7.
The common factors of 42 and 56 are 1,2,7 and 14