#include <bits/stdc++.h>
using namespace std;

int a,b,c,;
int number = 0;

int main() {
  cin >> a >> b >> c;
  for (int x = a; x <= b ; ++x) {
    int d = c/x;
    if (ceil(d) == floor(d)) {
      ++number;
    }
  }
  cout << number << endl;
}