18=2.32
=> Số ước nguyên Dương của 18 là: (1+1)(2+1)=6 ước
18=2.32
=>số các ước dương là :
(1+1).(2+1)=2.3=6
18 chia hết cho :1;2;3;6;9;18 suy ra có 6 ước
6 uoc dung 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
số các ước dương của 18 là (1+1).(2+1)=2.3=6
