if your asking because it is homework you are obviously supposed to know!
The only prime number (factor) of 169 is 13 (13 x 13 = 169).
It is impossible to list all squared prime numbers as there is an infinite number of squared prime numbers starting with 4, 9, 25, 49, 121, 169, 289, 361, 529, 841,...
There are 169.
121, 169, 289
13 x 13