The problem:

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The sequence of triangle numbers is generated by adding the natural numbers. So the 7th triangle number would be 1 + 2 + 3 + 4 + 5 + 6 + 7 = 28. The first ten terms would be:

1, 3, 6, 10, 15, 21, 28, 36, 45, 55, …

Let us list the factors of the first seven triangle numbers:

1: 1
3: 1,3
6: 1,2,3,6
10: 1,2,5,10
15: 1,3,5,15
21: 1,3,7,21
28: 1,2,4,7,14,28

We can see that 28 is the first triangle number to have over five divisors.

What is the value of the first triangle number to have over five hundred divisors?

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My Solution

#include <stdio.h>

int main(){
  int i,j,counter,max,ans;
  ans=0;
  max=0;
  for(i=1;i<13000;i++){
    ans=ans+i;
    counter=0;
    for (j=1;j<1000000;j++){
      if(ans%j==0)
        counter++;
      }
    if (counter>max){max=counter;}
    if (counter>500){printf("%dn",ans);break;}
    }
  printf("last ans=%d e max counter=%dn",ans,max);
  return 0;
}