C/C++ :: Maximum Divisor Sum - Determinate Number Between 2 And N

The problem says that i have a number n > 0 and the program should determinate the number between 2 and N who has the maximum divisor sum (1 and N wont count as divisor). If i have more numbers with maximum divisor sum, should wrote only first number. Exemple: for N = 100 , will show 96 bcoz he has the maximum divisor sum, which is 155. For the start i tried to show only the maximum divisor sum, not the number who has the maximum divisor sum with this code:

#include<stdio.h>
int main() {
int n,s=0,i,m;
printf("Please introduce the number N > 0:
");
scanf("%d", &n);
i = 2;

[Code] .....

And it shows me 116, but the correct results is 155. Which is the problem ?