import java.util.Scanner;
class Main{
  public static void main(String[] args){
  Scanner scanner = new Scanner(System.in);
  int a = scanner.nextInt();
  int b = scanner.nextInt();
  int c = scanner.nextInt();
  int z = 0;
  for(int i = a; i <= b; i++){
      if(c % i == 0){
          z++;
      }
      }
      System.out.println(z);
    }
  }