36, 14 and 21 have no common factors other than 1. Therefore, the greatest common factor is 1.
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The GCF of 14 and 21 is 7. The factors of 14 are: 1, 2, 7, 14 The factors of 21 are: 1, 3, 7, 21 The common factors are: 1, 7.
The GCF is 7.
7 and 14 14 and 21 7 and 21
The GCF is 1.
The GCF is 7.