using System;

public class Program

{

    public static void Main()

    {

        long ret = SmallestMultiple(20);

        Console.WriteLine(ret);

    }

    public static long SmallestMultiple(long x)

    {

        long val = 1;

        for (long i = 1; i <= x; i++)

        {

            if (val%i!=0)

            {   

                for (long j = 1;  j<=i; j++)

                {

                    long exVal = val*j;

                    if ((val*j)%i==0)

                    {

                        val*=j;

                        break;

                    }

                }

            }

        }

        return val; 

    }

}