The factors of 50 are: 1, 2, 5, 10, 25, 50
The factors of 128 are: 1, 2, 4, 8, 16, 32, 64, 128
The [only] common factor is 1.
The common factors are: 1, 2, 4, 8, 16, 32
The common factors of 38 and 50 are: 1 and 2
The common factors of 15 and 50 are 1 and 5
The common factors of 50 and 98 are: 1 and 2
The common factors of 50 and 15 are 1 & 5.
The common factors of 50 and 65 are 1 and 5
Common factors of 17 and 50 are: 1.
The common factors of 50 and 64 are: 1, 2
The common factors of 28 and 50 are 1 and 2
The common factors of 25 and 50 are 1, 5 and 25.All of them.
Since 50 is a factor of 350, all of its factors are common.