The factors of 56 are 1, 2, 4, 7, 8, 14, 28, 56. For them to be common, they need to be compared to another set of factors.
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 63 and 56 are: 1, 7
The common factors of 12 and 56 are: 1, 2, and 4
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
The common factors of 34, 56, and 150 are: 1 and 2
The common factors of 14 and 56 are 1, 2, 7 and 14.