a. B is two different prime numbers, then the greatest common factor of a and B is______ The least common multiple of a and B is______ .

a. B is two different prime numbers, then the greatest common factor of a and B is______ The least common multiple of a and B is______ .

Because a and B are two different prime numbers, a and B must be coprime numbers, so the greatest common factor of a and B is 1 and the least common multiple is ab