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A common factor is '7'

3 x 7 = 21

7 x 7 = 49

'7' appears in both multiples.

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lenpollock

Lvl 16
8mo ago
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Wiki User

8y ago

LCM: 147 GCD: 7

The common factors are 1 and 7.

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Wiki User

8y ago

They are 1 and 7

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Wiki User

8y ago

The common factors are 1 and 7.

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Q: What is a common factor of 21 and 49?
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