a. B is two non-zero natural numbers, and a △ B = 7, then the least common multiple of a and B is () and the greatest common factor is ()

a. B is two non-zero natural numbers, and a △ B = 7, then the least common multiple of a and B is () and the greatest common factor is ()

a. The least common multiple of B is (a) and the greatest common factor is (b)