[질문] 135와720의약수의갯수알려주세요

135약수1,3,5,9,15,27,45,135(8개)720약수약수 1,2,3,4,5,6,8,9,10,12,15,16,18,20,24,30,36,40,45,48,60,72,80,90,120,144,180,240,360,720약수의개수 30개