There are probably infinitely many ways.
For example,
2 + 23
3 + 5 + 17
5 + 7 + 13
or
37 - 5 - 7
41 - 3 - 13
and so on.
7 is a Prime number; its only prime factor is 7.
31 is a prime number. Its only prime factor is 31.
Only one - which is repeated.
The only prime factor of 16 is two.
There are infinitely many prime numbers. There is only one even prime number, which is 2, because all other even numbers are divisible by 2 and thus are not prime. So, there are infinitely many odd prime numbers and only one even prime number.
7 is a prime number; its only prime factor is 7.
You cannot make any composite number prime number because prime only has 2 factors.
53 is itself a prime so its only prime factor is 53.
7 is a Prime number; its only prime factor is 7.
31 is a prime number. Its only prime factor is 31.
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.
The only prime factor of 25 is 5.
2 is the only prime factor of 16.
Only one - which is repeated.
The only prime factor of 16 is two.
prime number
A prime number has only two factors which are itself and one.