Free Pascal assignment.
Basically, the task is:
We're given integer N. For integer D > 0 we say that he is divisor for N, if D divides N. What is the arithmetic mean of all the divisors of the given number N?
Input: One and only row of the standard input contains integer N (1<=N<=10^9).
Output: In a single line of standard output to print arithmetic mean of divisors given natural number. Number printed with an accuracy of two decimal places.
Please, I need help.