#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  int n = 0;
  cin >> a, b, c;
  for (int i = a; i <= b; i++) {
    if (c % i == 0) n += 1;
  }
  cout << n << endl;
  return 0;
}
