210=210X1
210=2X105
210=3X70
210=5X42
210=6X35
210=7X30
210=10X21
210=14X15
所以210的因数有1,2,3,5,6,7,10,14,15,21,30,35,42,70,105,210
210=210X1
210=2X105
210=3X70
210=5X42
210=6X35
210=7X30
210=10X21
210=14X15
所以210的因数有1,2,3,5,6,7,10,14,15,21,30,35,42,70,105,210