There are infinitely many such numbers.
It goes on to ist self
Four: 1, 2, 13, 26.
1, 2, 4, 13, 26, 52.
There are an infinite amount of prime numbers. Starting with 2, 3, 5, 7, 11, 13, 17 ... the numbers, as all numbers go to infinity.
1 and 13.
There are an infinite amount of prime numbers. Starting with 2, 3, 5, 7, 11, 13, 17 ... the numbers, as all numbers go to infinity.
26
Only 1 and 13, it's a prime.
13
Eight: 1, 2, 4, 8, 13, 26, 52, 104.
1 and 13.
These numbers go evenly into 52: 1, 2, 4, 13, 26, 52.
13