using System;

public class Program

{

    public static void Main()

    {

        var result = isPerfectRecursion(28, 0, 1);

        Console.WriteLine(result);

    }

    public static bool isPerfectRecursion(int number, int sumOfDividers,int  divider) {

    if (divider == number) {

        return number == sumOfDividers;

    }

​

    if(number % divider == 0) {

        return isPerfectRecursion(number, sumOfDividers + divider, divider+1);

    } 

    return isPerfectRecursion(number, sumOfDividers, divider+1);

}

}