import java.util.Scanner;

public class Main {

  private static int a, b, c, divisior_count;

  public static void main(String[] args) {
    Scanner stdIn = new Scanner(System.in);
    a = stdIn.nextInt();
    b = stdIn.nextInt();
    c = stdIn.nextInt();
    divisior_count = 0;

    for (int i = a; i <= b ; i++ ) {
      if (c % i == 0) {
        divisior_count++;
      }
    }
    System.out.println(divisior_count);
  }
}
/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