It is: 1
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The greatest common factor of 21 and 40 is 1 because there are no larger common factors.
The greatest common factor is two.
The factors of 40 are: 1, 2, 4, 5, 8, 10, 20, 40 The factors of 125 are: 1, 5, 25, 125 The common factors are: 1, 5 The Greatest Common Factor: 5
The greatest common factor (GCF) is 2.
1, 2, 4 are the common factors of 12 and 40, and 4 is the greatest common factor