The factors of 12 are:
1, 2, 3, 4, 6, 12
The factors of 28 are:
1, 2, 4, 7, 14, 28
The common factors are:
1, 2, 4
The Greatest Common Factor:
GCF = 4
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The greatest common factor of 12 and 20 is 4
The GCF of 4, 12, and 20 is 4The GCF is: 4
The GCF is 2.
The GCF is 4.
The GCF is 2.