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.