//SANTOS, RAY ALLEN C.

//CCP 1103 - ITBC

//ABUNDANT NUMBER

​

using System;

public class Program

{

    public static void Main()

    {

        string input;

            int inputNumber;

            int sum = 0;

​

            Console.WriteLine("Abundant Number");

            Console.WriteLine("");

            Console.Write("Enter a number: ");

            input = Console.ReadLine();

​

            if (Int32.TryParse(input, out inputNumber) == true)

            {

                if (inputNumber <= 0)

                {

                    Console.WriteLine("Zero or negative input is not allowed.");

                }

                else

                {

                    for (int i = 1; i <= inputNumber; i++)

                    {

                        if (inputNumber <= 0)

                        {

                            Console.WriteLine("Zero or negative input is not allowed.");

                        }

                        else

                        {

                            if (inputNumber % i == 0)

                            {

                                sum += i;

                            }

                        }

                    }

                    inputNumber = inputNumber * 2;

                    if (sum > inputNumber)

                    {

                        sum = sum - inputNumber;

                        Console.WriteLine("{0} is an abundant number.", input);

                        Console.WriteLine("The abundance is {0}.", sum);

                    }

                    else

                    {

                        Console.WriteLine("{0} is not an abundant number.", input);

                    }

                }

            }

            else

            {

                Console.WriteLine("Please enter numeric values only.");

            }

    }

}