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();
		sc.close();
		int ct = 0;
		for(int i = a; i <= b; i++){
			if(c%i == 0)
				ct++;
		}
		System.out.println(ct);
	}
}