They are: 1, 2, 3, 6, 9 and 18 which makes six of them
Exactly three times
2
Six factors.
There can be infinitely many distinct factors.
the factors are 1,2,3,4,6,8,12,24 and it has 8 factors
Seven factors.
10 factors
Two factors.
24 factors.
Four factors
Four factors.
Sixteen factors.