import java.util.Scanner;

public class Main {	
	public static void main(String[]args){
		Scanner scan =new Scanner(System.in);
			int a =scan.nextInt();
			int b =scan.nextInt();
			int c =scan.nextInt();
			
			int cnt =0;
			for(int i =a; i <=b;i++){
				if(c%i==0){
					cnt++;
				}
				
			}
			System.out.println(cnt);				
			}
	}