I hate doing it, but I think I'll have to show you some examples as to how to do.

For example

-----------------------------------

**Question** : what is the power of

,

, in the prime factorisation of 20 ?

The formula tells us it is :

What will follow after the 0 are 0's too because you keep dividing 20 by a large number. And as soon as it becomes less than 1, the value

becomes 0.

Thus

**Question** : what is the power of

,

in the prime factorisation of 20! ?

Thus

divides

Do it for all prime numbers, labelled from 1 to ... m

Got it ?