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The Greatest Common Factor (GCF) of 20 and 28 is 4.

The factors of 20 are 1, 2, 4, 5, 10, and 20

The factors of 28 are 1, 2, 4, 7, 14, and 28

The common factors are: 1, 2, 4

The Greatest Common Factor (GCF) is: 4

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7y ago

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