import java.util.Scanner;

class Main {
  public static void main(String[] args){
    Scanner cin = new Scanner(System.in);
    int a, b, c;
    a = cin.nextInt();
    b = cin.nextInt();
    c = cin.nextInt();
    
    int res = serch_divisor_number(a, b, c);

    System.out.println(res);
  }

  private static int serch_divisor_number(int a, int b, int c){
    int m = 0;
    for (int i = a; i <= b; i++){
      if (c % i == 0) m++;
    }
    return (m);
  }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz