main.cs

using System;
using System.IO;
using System.Text;


/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/
class Solution
{
    static void Main(string[] args)
    {
        long n = int.Parse(Console.ReadLine());

        // Write an action using Console.WriteLine()
        // To debug: Console.Error.WriteLine("Debug messages...");

        for (long divide = 1; divide <= Math.Sqrt(n * n); divide++)
        {
            if (n * n % divide == 0)
            {
                long y = n + n * n / divide;
                long x = divide + n;
                if (x > y) break;
                if (x > 0 && y > 0)
                    Console.WriteLine($"1/{n} = 1/{y} + 1/{x}");
            }
        }
    }
}