The only common factor is 1.
The only common factors of 28 and 100 are 2, 4.
The factors of 700 are 1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 100, 140, 175, 350, 700. For them to be common, they need to be compared to another set of factors.
The factors of 63 are: 1, 3, 7, 9, 21, 63The factors of 112 are: 1, 2, 4, 7, 8, 14, 16, 28, 56, 112The factors of 175 are: 1, 5, 7, 25, 35, 175The common factors are: 1, 7
The common factors of 28 and 84 are 1,2,4,7,14 and 28
The common factors of 28 and 84 are 1,2,4,7,14 and 28.
The factors of 28 are 1,2,4,7,14 and 28. "Common" means "same for both". For these factors to be common, they need to be compared to the factors of another number.
The common factors of 28 and 63 are: 1 and 7
The common factors of 28 and 49 are 1 and 7.
The common factors of 18 and 28 are 1 and 2
Common factors of 28 and 30 are: 1 and 2.
The common factors of 28 and 50 are 1 and 2
The common factors of 14 and 28 are 14,7,2,1.