
import java.util.Scanner;
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 i = 0;
		int j = 0;
		for(i = a ; i <= b ; i++){
			if(c % i ==0){
				j++;
			}
		}
		System.out.println(j);
	}

}