import java.util.Scanner;

public class Main2 {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int a = scan.nextInt();
		int b = scan.nextInt();
		int c = scan.nextInt();
		int count = 0;
		for(int i = a ; i<=b ; i++){
				if(c%i==0)count++;
		}
		System.out.println(count);
		
	}

}