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 count = 0;
		
		for(int i = a; i <= b; i++) {
			if ( (c % i) == 0 ) {
				count++;
			}
			
		}

	}
}