How can I prove that $\mathbb{Z}/p^q$, where $p$ is prime, is a UFD?
Well, I know that if $q=1$, it is because then it is a field.
How can I prove that $\mathbb{Z}/p^q$, where $p$ is prime, is a UFD?
Well, I know that if $q=1$, it is because then it is a field.