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The factors of 21 are: 1, 3, 7, 21

The factors of 45 are: 1, 3, 5, 9, 15, 45

The common factors are: 1, 3

The Greatest Common Factor (GCF) is: 3

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14y ago

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15

The answer is 15. The question was What is the GCF of HCF of 15 and 45.

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14y ago
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The GCF is 15.

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12y ago
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The GCF is 9.

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Wiki User

8y ago
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It is: 3

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Wiki User

7y ago
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Q: What are the the greatest common factors of 45 and 15?
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