They have 1 and 7 in common, but no, they don't have the same factors.
Factors are those numbers which can be evenly divided into a number. The factors of 21 would be 1, 3, 7, 21 The factors of 28 would be 1, 2, 4, 7, 14, 28 The factors of 15 would be 1, 3, 5, 15
The factors of 28 are: 1, 2, 4, 7, 14, 28 The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42 The factors of 63 are: 1, 3, 7, 9, 21, 63
15: 1,3,5,15 28: 1,2,4,7,14,28 21: 1,3,7,21 35: 1,5,7,35
7
1 and 7
The factors of 28 are: 1, 2, 4, 7, 14, 28 The factors of 63 are: 1, 3, 7, 9, 21, 63
28 is a multiple of 14, so it can be proven that any factor of 14 must be a factor of 28.
the greatest common factor is 7, because 21 divided by 7 is 3, 28 divided by 7 is 4 and 56 divided by 7 is 8.
The factors of 21 are: 1, 3, 7, and 21.The prime factors of 21 are: 3 and 7.The factors of 28 are: 1, 2, 4, 7, 14, and 28.The prime factors of 28 are: 2 and 7.21- 1,3,7, and 2128- 1,2,4,7,14, and 28(-: i hope that this helps! (-:
The factors of 21 are: 1, 3, 7, 21. The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56.
The factors of 14 are:1, 2, 7, 14The factors of 21 are:1, 3, 7, 21The factors of 28 are:1, 2, 4, 7, 14, 28The common factors are:1, 7
The factors of 21 are: 1, 3, 7, 21 The factors of 84 are: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84