module S = Set.Make (struct
  type t = string
  let compare = String.compare
end)

let () =
  let n = read_int () in
  let rec doit i s =
    if i * i > n then s
    else doit (i + 1)
      (if n mod i <> 0 then s
       else S.(s |> add (string_of_int i) |> add (string_of_int (n / i)))) in
  doit 1 S.empty
  |> S.cardinal
  |> Printf.printf "%d\n"