26 and 30, 21 and 35, 11 and 121

26 and 30 greatest common divisor 2 least common multiple 390
21 and 35 greatest common divisor 7 least common multiple 105
11 and 121 greatest common divisor 11 least common multiple 121

What are the common factors of 42 and 81

The common factor is the factor that can divide these two numbers at the same time, only 1 and 3

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