16
8,2
4,2,2
2,2,2,2
16 8,2 4,2,2 2,2,2,2
16 8,2 4,2,2 2,2,2,2
16 8,2 4,2,2 2,2,2,2
16 8,2 4,2,2 2,2,2,2
16 8,2 4,2,2 2,2,2,2
The only prime factor of 16 is 2.
by using a prime factor tree
The only prime factor of 16 is 2.
Small words make a difference. No prime number "has" a factor of 16. But 2 is the only prime number that "is" a factor of 16.
199 is a prime number. It does not have a tree since it only has one prime factor, itself.
13 is a prime number. It doesn't have a tree because its only prime factor is itself.
Only one branch at the bottom of any factor tree.