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3 x 7 x 7 x 11 x 13

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βˆ™ 10y ago
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βˆ™ 12y ago

21

3,7

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βˆ™ 13y ago

3 x 7 = 21

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βˆ™ 14y ago

21 = 31*71

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Q: What is the prime factor tree of 21?
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