calculus - What is the limit $ underset{ntoinfty}{lim} frac {{n!}^{1/n}}{n} $

What is the following limit equal to and how do I prove it?

$$ \underset{n\to\infty}{\lim} \frac {{n!}^{1/n}}{n}. $$

I've been trying for a while and I can't seem to get it.