import java.util.Scanner;

/**
 * Created by labuser on 2016/04/20.
 */
public class Main {
    public static void main(String[] args) {
        new Main().run();

    }

    private void run() {

        int a, b, c;

        Scanner sc = new Scanner(System.in);
        String[] input = sc.nextLine().split(" ");
        a = Integer.parseInt(input[0]);
        b = Integer.parseInt(input[1]);
        c = Integer.parseInt(input[2]);
        int cnt = 0;
        for (int i = a; i <= b; i++) {
            if (c % i == 0) cnt++;
        }
        System.out.println(cnt);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz