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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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8y ago
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6y ago

13 is a Prime number so its only factors are 1 and itself. Since 13 is not a factor of 28, the only common factor of 13 and 28 is 1.

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13y ago

The Greatest Common Factor (GCF) is: 4

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11y ago

The GCF is 4.

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13y ago

4.

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6y ago

It is: 1

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Q: What is the greatest common factor of 12 and 20 and 28?
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