import java.io.IOException;
import java.util.Scanner;
public class Main {

	public static void main(String[] args) throws IOException{
		// TODO ?????????????????????????????????????????????
          Scanner sc = new Scanner(System.in);
          int a = sc.nextInt();
          int b = sc.nextInt();
          int c = sc.nextInt();
          int d;
          d=0;
          while(a<=b){
        	  if(c%a == 0){
        		d=d+1;  
        	  }
        	  a=a+1;
          }
          System.out.println(d);
	}

}
/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