A = 2 × 2 × 3 × 7, B = 2 × 2 × 2 × 7, the greatest common divisor of a and B is______ The least common multiple is______ .

A = 2 × 2 × 3 × 7, B = 2 × 2 × 2 × 7, the greatest common divisor of a and B is______ The least common multiple is______ .

A = 2 × 2 × 3 × 7, B = 2 × 2 × 2 × 7, so the greatest common divisor of a and B is 2 × 2 × 7 = 28, and the least common multiple is 2 × 2 × 7 × 3 × 2 = 168