//ALISEN, MARIEL CAMILLE T.

//CCP 1103 - ITBC

//ABUNDANT NUMBER

​

using System;

public class Program

{

    public static void Main()

    {

         string number;

            int inputNumber;

            int sum = 0;

            int formula;

            int abundanceNumber;

​

            Console.Clear();

            Console.WriteLine("Abundant Number");

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

            number = Console.ReadLine();

​

            if (int.TryParse(number, 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 % i == 0)

                        {

                            sum = sum + i;

                        }

                    }

                    formula = inputNumber * 2;

                    abundanceNumber = sum - formula;

                    if (sum > formula)

                    {

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

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

                    }

                    else

                    {

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

                    }

                }

            }

            else

            {

                Console.WriteLine("Invalid input. Please enter a valid input.");

            }

​

        }

    }

​