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The factors of 21 are:

1, 3, 7, 21

The factors of 23 are:

1, 23

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Wiki User

12y ago

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More answers

The factors of 15 are: 1, 3, 5, 15
The factors of 21 are: 1, 3, 7, 21

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Wiki User

8y ago
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1,3,5,15

1,23

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Wiki User

13y ago
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The GCF is 1.

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Wiki User

12y ago
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Q: What are the factors for 15 and 21?
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