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