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