#include <bits/stdc++.h>
int main() {
  int a, b, c;
  int x, n;
  x = 0;
  n = 0;
  scanf("%d %d %d", &a, &b, &c);
  for (x = a; x <= b; x++) {
    if ((c / x) * x == c) {
      n++;
    }
  }
  printf("%d??\???", n);
  return 0;
}
