(1)因为6×4=24,所以24÷6=4,24÷4=6,即6和4是24的因数,24是6的倍数,也是4的倍数;(2)45÷5=9,我们说45是5的倍数,5是45的因数;故答案为:因数,倍数,倍数,45,5,5,45.