4 (its factor is: 1, 2,4)
9 (its factor is: 1, 3,9)
There are exactly four factors:
6 (its factor is: 1, 2, 3, 6)
8 (its factor is: 1, 2, 4, 8)
10 (its factor is: 1, 2,5, 10)
14 (its factor is: 1, 2,7, 14)
15 (its factor is: 1, 3,5, 15)
There are exactly five factors:
16 (its factor is: 1, 2,4,8, 16)
There are exactly six factors:
12 (its factors are: 1, 2, 3, 4, 6, 12)
18 (the factors are: 1, 2, 3, 6, 9, 18.
I hope I am satisfied! !