16
4 and 9
6, 8, 10, 14, 15
It's a tie between 12 and 18. Each of them has 6 factors. Factors of 12: 1, 2, 3, 4, 6, and 12. Factors of 18: 1, 2, 3, 6, 9, and 18.
The prime numbers between 1 and 20 are: 2, 3, 5, 7, 11, 13, 17 and 19. Note that a prime number has only two factors, 1 and itself and one. Number 1 is not considered to be a prime number because it has only one factor.
The factors of 16 are 1, 2, 4, 8, and 16.
16 has five factors.
12, 18 and 20 each have six factors.
16
5, 10, 15 and 20 have five as a factor. The number 16 has five factors.
16 does.
16
4 and 9
The factors of 16 are: 1, 2, 4, 8, and 16.
1 and 5
How about 16 whose factors are 1 2 4 8 and 16
16