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# What are the common factors of 21 and 42?

Updated: 4/28/2022

Wiki User

14y ago

The common factors of 21 and 42 are 1,3,7,21

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14y ago

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Q: What are the common factors of 21 and 42?
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The common factors of 21 42 and 84 are 21

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The common factors of 21, 42, and 56 are: 1 and 7

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The common factors of 21 and 42 are 3, 7 and 21. The greatest common factor (GCF) is 21.

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The factors of 21 are: 1, 3, 7, 21.The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42.The common factors are: 1, 3, 7, 21

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1, 3, 7, and 21 are all common factors of 21 and 42.

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### Common factors for 42?

The factors of 42 are 1, 2, 3, 6, 7, 14, 21, 42. For them to be common, they need to be compared to another set of factors.

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The factors of 42 are 1, 2, 3, 6, 7, 14, 21, 42. For them to be common, they need to be compared to another set of factors.

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### What is the greatest common factor of 21and42?

Factors of 21: 1, 3, 7, 21 Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42 GCF (21, 42) = 21