What is the greatest common factor of 18 and 54______ The least common multiple is______ .

What is the greatest common factor of 18 and 54______ The least common multiple is______ .

54 △ 18 = 3, that is, 54 and 18 are multiple relations, so their greatest common factor is 18, and their least common multiple is 54; so the answer is: 18, 54