The factors of 21 are:
1, 3, 7, 21.
The factors of 56 are:
1, 2, 4, 7, 8, 14, 28, 56.
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Positive integers factors of 56 and 21:-
56: 1, 2, 4, 7, 8, 14, 28 and 56.
21: 1, 3, 7 and 21.
The common positive integer factors of 56 and 21 are 1 and 7.
The common factors of 21, 42, and 56 are: 1 and 7
The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The factors of 56 are 1, 2, 4, 7, 8, 14, 28, and 56.
The Greatest Common Factor (GCF) is: 7
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.
Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42.Factors of 56: 1, 2, 4, 7, 8, 14, 28, 56.Factors of 70: 1, 2, 5, 7, 10, 14, 35, 70.GCF (42, 56, 70) = 14