class IPN {

    public boolean isPerfectNumber(int number){

        int temp = 0;
        for(int i=1; i<=number/2; i++){
            if(number%i == 0){
                temp += i;
            }
        }
        if(temp == number){
            System.out.println("Ez tokeles szam, jipiajee");
            return true;
        } else {
            System.out.println("Sajnalom, ez most nem tokeletes..");
            return false;
        }
    }

    public static void main(String a[]){
        System.out.println("Ez tokeletes szam: "+ipn.isPerfectNumber(28));
    }
}