using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication89
{
class Program
{
static void Main(string[] args)
{
int number, sum = 0, n;
Console.Write("enter the Number:");
number = int.Parse(Console.ReadLine());
n = number;
for (int i = 1; i < number; i++)
{
if (number % i == 0)
{
sum = sum + i;
}
}
if (sum == n)
{
Console.WriteLine("\n Entered number is a perfect number");
Console.ReadLine();
}
else
{
Console.WriteLine("\n Entered number is not a perfect number");
Console.ReadLine();
}
}
}
}
output screenshot:

using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication89
{
class Program
{
static void Main(string[] args)
{
int number, sum = 0, n;
Console.Write("enter the Number:");
number = int.Parse(Console.ReadLine());
n = number;
for (int i = 1; i < number; i++)
{
if (number % i == 0)
{
sum = sum + i;
}
}
if (sum == n)
{
Console.WriteLine("\n Entered number is a perfect number");
Console.ReadLine();
}
else
{
Console.WriteLine("\n Entered number is not a perfect number");
Console.ReadLine();
}
}
}
}
output screenshot:

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