13 x 1
1 and 13
5 times 13
6.5 and 2
No whole numbers, if that's what you mean, except for the trivial 1 x 13. 13 is a prime number.
13*13
13x2=26
13 x 1
1 and 13
How about: 13 times 13 = 169
13 and 3
3 and 13.
12 and 13
5 times 13
6.5 and 2
338
13*31=403 13 and 31 are prime numbers.