using C=System.Console;class M{static void Main(){foreach(var s in C.ReadLine().Split()){int i,j,k=2,n=0;var b=int.TryParse(s, out i);for(j=i;j/2!=0;)if(j%k++==0){n+=i/--k;j/=k;}C.WriteLine(b?""+n:"Wait, that's not a number...");}}}