6=1+2+3 ......

factorSum

import java.util.Scanner;


public class Test {


    public static boolean factorSum(int inPut){

        int result = 0;

        for (int i = 1; i <= inPut/2; i++) {
            if (inPut%i == 0) {
                result += i;
            }
        }

        if (result == inPut) {
            return true;
        }else{
            return false;
        }


    }

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        int inPut ;

        do {
            System.out.print("input num(0 to quit) :");
            inPut = scanner.nextInt();
            System.out.println();

            for (int i = 1; i < inPut; i++) {
                if (factorSum(i)) {
                    System.out.print(i + ",");
                }
            }


        }while ( inPut !=0);

        System.out.println("TKS");

    }

}