21 has four factors: 1, 3, 7 and 21.
The common factors of 6 and 21 are 1 and 3.
The factors of 6 are 1, 2, 3, and 6. The factors of 21 are 1, 3, 7, and 21. The common factors of 6 and 21 are 1 and 3, and the GCF is 3.
6 factors into [2 3] 21 factors into [3 7] Common factor is [3]◄
They are 1, 2, 3, 6, 7 and 21.
The factors of 18 are: 1, 2, 3, 6, 9, 18The factors of 21 are: 1, 3, 7, 21
1,2,3,6 1,3,7,21
1,2,3,6 1,3,7,21
1, 3, 7, 21 1, 2, 3, 6, 7, 14, 21, 42
The factors of 12 are: 1, 2, 3, 4, 6, 12 The factors of 21 are: 1, 3, 7, 21 The factors of 30 are: 1, 2, 3, 5, 6, 10, 15, 30
The factors of 21 are: 1, 3, 7, 21 The factors of 66 are: 1, 2, 3, 6, 11, 22, 33, 66
The factors of 18 are: 1, 2, 3, 6, 9, and 18.The prime factors of 18 are: 2 and 3.The factors of 21 are: 1, 3, 7, and 21.The prime factors of 21 are: 3 and 7.
what two factors of -21 add up to -6