import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a,b,c,count=0;
    a = sc.nextInt();
    b = sc.nextInt();
    c = sc.nextInt();
    for(int i = a;i <= b;i++){
      if(c % i == 0)count++;
    }
    System.out.println(count);
    sc.close();
  }
}

