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The factors of 21 are 1, 3, 7 and 21.

The factors of 18 are 1, 2, 3, 6, and 18.

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9y ago

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More answers

The factors of them are:

12: 1, 2, 3, 4, 6, 12

18: 1, 2, 3, 6, 9, 18

21: 1, 3, 7, 21

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9y ago
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1, 2, 4, 5, 10, 20

1, 3, 7, 21

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9y ago
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1, 17

1, 3, 7, 21

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9y ago
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They are: 1, 3, 7 and 21

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11y ago
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1, 2, 3, 6, 9, 18.

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8y ago
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1 and 3.

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8y ago
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Q: What goes into 18 and 21?
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