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

/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