They are: 1 and 3
45:1,5,9,42 42:1,2,6,7,21,42
The factors of 25 are: 1, 5, 25 The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 45 are: 1, 3, 5, 9, 15, 45
The common factors of 42 and 273 are 1, 3, 7 and 21.
The common factors of 22 and 42 are: 1 and 2
The common factors of 42 and 77 are: 1 and 7
The common factors of 42 and 92 are: 1 and 2
The Common Factors of 42 and 44 are 1, 2
The common factors of 35 and 45 are: 1 and 5
The common factors of 21 42 and 84 are 21
The common factors of 42 and 44 are 1 and 2.
The common factors of 24 and 45 are: 1 and 31 and 3
The common factors of 42 and 56 are 1,2,7 and 14