02. Division

using System;

namespace Division
{
    class Program
    {
        static void Main(string[] args)
        {
            int num = int.Parse(Console.ReadLine());
            int output = 0;

            if (num % 10 == 0)
            {
                output = 10;
            }
            else if (num % 7 == 0)
            {
                output = 7;
            }
            else if (num % 6 == 0)
            {
                output = 6;
            }
            else if (num % 3 == 0)
            {
                output = 3;
            }
            else if (num % 2 == 0)
            {
                output = 2;
            }

            if (output != 0)
            {
                Console.WriteLine($"The number is divisible by {output}");
            }
            else
            {
                Console.WriteLine("Not divisible");
            }
        }
    }
}


Решение с тернарен оператор:

using System;

namespace Division
{
    class Program
    {
        static void Main(string[] args)
        {
            int num = int.Parse(Console.ReadLine());
            string output =
                num % 10 == 0 ? "10" :
                num % 7 == 0 ? "7" :
                num % 6 == 0 ? "6" :
                num % 3 == 0 ? "3" :
                num % 2 == 0 ? "2" : "Not divisible";

            Console.WriteLine(output == "Not divisible" ? "Not divisible" : $"The number is divisible by {output}");
        }
    }
}