Yes, an infinite number.
Only by itself and one because 13 is a prime number
52, 26, 13, 6.5, 3.25, 2, 1
9/13 is already in simplest form. 13 is prime, it can't be divided by anything.
143 can be divided by any number you like, but the quotient won't be a whole number unless you choose 1, 11, 13, or 143, or the negative of any of those.
12
221 divided by 13 = 17221 divided by 17 = 13
anything that ends in an even number can be divided.
An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. 13 is an odd number.
A prime number can only be divided by itself and 1. 4 can be divided by 2 26 can be divided by 2 15 can be divided by 3
1, 13, 23, 299
13 is a prime number so none