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

