/*
TASK: sum
LANG: C++
*/
#include<iostream>
using namespace std;
int main()
{
    int tmp=1,n,br=0;
    scanf("%d",&n);
    while(1)
    {
      n-=tmp;
      if(n%(tmp+1)==0)br++;
      tmp++;
      if(tmp+1>n)break;
    }
    printf("%d\n",br);
return 0;
}


