#include <iostream>
    
using namespace std;
    
int main(){
 int a,b,c,n=0;
 cin >> a;
 cin >> b;
 cin >> c;
 while (1) {
  if (c/a*a=c) {
   n++
  }
  if (a==b) break;
  a++;
 }
 cout <<n<<endl;
 return 0;
}
