#include <bits/stdc++.h>
using namespace std;

int main(){
   int a,b,c;
   int d = 0
   cin>>a>>b>>c;
   for(int x = a;x <= b;x++){
      if(c%x = 0){
         d += 1
      }
   }
   cout << d << endl;
   return 0;
}
