The common factors of 21 and 63 are 1, 3, 7, and 21
Since 21 is a factor of 63, all of its factors are common.
The common factors of 21 and 63 are: 1, 3, 7, and 21
The common factors of 21 and 63 are: 1, 3, 7, and 21.
The common factors of 63 and 84 are: 1, 3, 7, and 21
The greatest common factor of 63 and 147 is 21.
The factors of 63 are 1, 3, 7, 9, 21 and 63. For them to be common, they need to be compared to another set of factors.
The factors of 21 are:1, 3, 7, 21The factors of 63 are:1, 3, 7, 9, 21, 63The common factors are:1, 3, 7, 21
The common factors are: 1, 3
The factors of 63 are:1, 3, 7, 9, 21, 63The factors of 147 are:1, 3, 7, 21, 49, 147The common factors are:1, 3, 7, 21
The factors of 27 are 1, 3, 9, and 27. The factors of 63 are 1, 3, 9, 7, 21, and 63. The common factors of 27 and 63 are 1, 3, and 9.
1 and 7
The greatest common factor is 21