import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int yaku = 0;

		for (;a == b; a++) {
			if (c % a == 0) {
				yaku++;
			}else{
				
			}

		}
		System.out.println(yaku);
	}

}

