import java.util.*;

class Main {

   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      int a = Integer.parseInt(sc.next());
      int b = Integer.parseInt(sc.next());
      int c = Integer.parseInt(sc.next());
      int cnt = 0;
      for (int i = a; i <= b; i++) {
         if (c % i == 0)
            cnt++;
      }
      System.out.printf("%d\n", cnt);
   }
} import java.util.*; util.* java class Main {

   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      int a = Integer.parseInt(sc.next());
      int b = Integer.parseInt(sc.next());
      int c = Integer.parseInt(sc.next());
      int cnt = 0;
      for (int i = a; i <= b; i++) {
         if (c % i == 0)
            cnt++;
      }
      System.out.printf("%d\n", cnt);
   }
} Main public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      int a = Integer.parseInt(sc.next());
      int b = Integer.parseInt(sc.next());
      int c = Integer.parseInt(sc.next());
      int cnt = 0;
      for (int i = a; i <= b; i++) {
         if (c % i == 0)
            cnt++;
      }
      System.out.printf("%d\n", cnt);
   } main {
      Scanner sc = new Scanner(System.in);
      int a = Integer.parseInt(sc.next());
      int b = Integer.parseInt(sc.next());
      int c = Integer.parseInt(sc.next());
      int cnt = 0;
      for (int i = a; i <= b; i++) {
         if (c % i == 0)
            cnt++;
      }
      System.out.printf("%d\n", cnt);
   } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = Integer.parseInt(sc.next()); a Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int b = Integer.parseInt(sc.next()); b Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int c = Integer.parseInt(sc.next()); c Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int cnt = 0; cnt 0 for (int i = a; i <= b; i++) {
         if (c % i == 0)
            cnt++;
      } int i = a; int i = a; i a i <= b i b i++ i++ i {
         if (c % i == 0)
            cnt++;
      } {
         if (c % i == 0)
            cnt++;
      } if (c % i == 0)
            cnt++; c % i == 0 c % i c i 0 cnt++ cnt System.out.printf("%d\n", cnt) System.out.printf System.out System System.out "%d\n" cnt String[] args args
import java.util.*;

class Main {

   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      int a = Integer.parseInt(sc.next());
      int b = Integer.parseInt(sc.next());
      int c = Integer.parseInt(sc.next());
      int cnt = 0;
      for (int i = a; i <= b; i++) {
         if (c % i == 0)
            cnt++;
      }
      System.out.printf("%d\n", cnt);
   }
}