The factors of 21 are: 1, 3, 7, 21
The factors of 28 are: 1, 2, 4, 7, 14, 28
84
The GCF is 7.
The Greatest Common Factor (GCF) is: 4
84
364
The GCF is 4.
It is: 4
The common factors of 21 and 51 are: 1 and 3
The common factors of 21 42 and 84 are 21
The common factors of 21 and 63 are 1, 3, 7, and 21
The factors of 21 are 1,3,7, and 21. The factors of 70 are 1,2,5,7,14,35, and 70 The common factors of 21 and 70 are 1 and 7.
The factors of 21 are 1, 3, 7 and 21. For them to be common, they need to be compared to another set of factors.