#include <bits/stdc++.h>
int zyouyo(int a);
int main(void) {
  int a, b, c, d = 0, kotae;
  scanf("%d %d %d", &a, &b, &c);
  for (1; a <= b; a++) {
    kotae = zyouyo(a);
    if (kotae = 0) {
      d = d + 1;
    }
  }
  printf("%d\n", d);
  return 0;
}
int zyouyo(int a) {
  int c, kotae;
  kotae = c % a;
  return kotae;
}
