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