program nsd;

{$APPTYPE CONSOLE}



var i,j,n,k:integer;
begin
assign (input,'pair.in');
reset(input);
assign (output,'pair.out');
rewrite(output);
readln(n);
k:=0;
 for j:=1 to n do
  for i:=1 to j do
  if (j mod i=0) then k:=k+1;
  writeln(k);
close(output);
close(input);
  { TODO -oUser -cConsole Main : Insert code here }
end.