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The numbers that go into both 21 and 70 evenly are their common factors. The greatest common divisor (GCD) of 21 and 70 is 7, which means 7 is the largest number that divides both evenly. The factors of 21 are 1, 3, 7, and 21, while the factors of 70 are 1, 2, 5, 7, 10, 14, 35, and 70. Thus, the common factors are 1 and 7.

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AnswerBot

3w ago

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