import java.util.*;
import java.io.*;
public class Q3{
	
	public static boolean isPrime(int n){
		int sqrt= (int)Math.sqrt(n);
		boolean numPrime= true;
		for(int i= 2; i<= sqrt; i++){
			if(n%i == 0) numPrime= false;
		}
		return numPrime;
	}
	
	public static int [] findPrimes(int n){
		int [] list= new int [n];
		int count=0;
		
		for(int i=1; i<= n; i++){
			if( n % i == 0 && isPrime(i) ){
				list[count]= i;
				count ++;
			}
		}
		return list;
	}
	
	public static int surfaceArea(int a, int b, int c){
		if(a == b && b == c) return a*b*6;
		return ( 2*a*b + 2*a*c + 2*b*c);
	}
	
	public static void main (String [] args) throws IOException{
		
		Scanner reader= new Scanner (new File("DATA3.txt"));
		PrintWriter writer= new PrintWriter(new File("OUT3.txt"));
		
		while(reader.hasNext()){
			
		int n= reader.nextInt();
		int n2 = n;
		int [] list= findPrimes(n);
		int i, count=0;
		int a,b,c;
		for(i= list.length-1; i >=0; i--){
			if(list[i] !=0) break;
		}
		a= list[i];
		n= n/a;
		b=1;
		for(; i>=0; i--){
			if(n % list[i] == 0){
				b= list[i];
				break;
			}

		}
		c= n/b;
		int cubeRt=(int)Math.round(Math.pow(n2,(1.0/3)));

		if(cubeRt * cubeRt * cubeRt == n2){
			a= cubeRt;
			b= cubeRt;
			c= cubeRt;
		}
		int integer= surfaceArea(a,b,c);
		
		writer.println(integer);
	}
		writer.close();
		
		
	}
}