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

		}
		
		System.out.println(r);
		

	




    }

}

