Poj Solution 1183

http://poj.org/problem?id=1183

//* @author popop0p0popo
import java.util.*;
import java.io.*;

public class Main{
 public static void main(String[] args){
  Scanner scanner=new Scanner(new BufferedReader(new InputStreamReader(System.in)));
  long a=scanner.nextInt();
  long m=1;
  for (long i=a;i>=1 ;i-- ){
   if ((a*a+1)%i==0){
    m=i;
    break;
   }
  }
  System.out.println(2*a+m+(a*a+1)/m);
 }
}