#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, x, y, n, d, j;
  n = 0;
  d = 0;
  cin >> a >> b >> c;
  x = a;
  a <= b;
  j = b - 1;
  1 <= a;
  b;
  c <= 100000000;
  while (x <= b) {
    if (x <= b) x = x + 1;
    y = c / x;
    if (0 == c - (x * y))
      n = n + 1;
    else
      d = d + 1;
  }
  cout << n << endl;
}
