import java.util.Scanner;

public class Volume_wrongloop {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int V = sc.nextInt();
		
		int min = (int) 1e9;
		
		for(int i = 1; i <= V; i++)
		{
			if((V%i) == 0)
			{
				int W = V/i;
				for(int j = 1; j < W; j++)
				{
					if((W%j) == 0)
					{
						int k = W/j;
						int val = 2 * i * j + 2 * i * k + 2 * j * k;
						min = Math.min(val, min);
					}
				}
			}
		}
		System.out.println(min);
		
	}
}