import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    try (Scanner scanner = new Scanner(System.in)) {
      final int start = scanner.nextInt();
      final int end   = scanner.nextInt();
      final int c     = scanner.nextInt();
      int counter = 0;
      for (int i = start; i <= end; i++) {
        if (c % i == 0) {
          counter++;
        }
      }
      System.out.println(counter);
    }
  }
}
/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