import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int count = 0;

        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();

        if (a == b && b == c) {
            break;
        }

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