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what are the common factor of 12 and 18 what are the common factors of 12 18 and 36 what are the common factors of 12 18 and 30 what are the common factors of 12 18 and 21 what are the common factors of 12 18 and 84 what are the common factors of 12 18 and 26 what are the common factors of 12 18 40 what are the common factors of 12 18 and 27 what are the common factors of 18 12 and 20 what are the greatest common factor of 12 18
