import java.util.Scanner;
public class Main {


	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		int a,b,c,cnt;
		
		a=sc.nextInt();
		b=sc.nextInt();
		c=sc.nextInt();
		
		cnt=0;
		for(int i=a;i<=b;i++){
			if (c % i==0){
				cnt++;
			}
		}
		System.out.println(cnt);
		
	}

}