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


