The factor of 18 is______ The prime factor of 18 is______ .

The factor of 18 is______ The prime factor of 18 is______ .


18 = 1 × 18 = 2 × 9 = 3 × 6; the factors of 18 are: 1, 2, 3, 6, 9, 18, of which the prime factor is 2, 3; so the answer is: 1, 2, 3, 6, 9, 18, 2, 3