练习一,（选自教材,P4,）,14,是,2,和,7,的倍数,2,和,7,是,14,的因数,16,是,2,和,8,的倍数,2,和,8,是,16,的因数,（,1,）,118=18 29=18 36=18,181=18 92=18 63=18,（,2,）,1,、,2,、,9,、,3,、,6,、,18,是,18,的因数。,124=24 212=24 38=24 46=24,1,、,2,、,3,、,8,、,4,、,6,、,24,都是,24,的因数,9,18,27,36,45,54,63,72,81,90,99,9,8,岁,