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