local mfl, mce = math.floor, math.ceil
local n = io.read("*n")
local ans = {}
for x = 0, n do
  for y = 0, n do
    if n < x * y then break end
    if 0 < x + y then
      local rem = n - x * y
      if rem % (x + y) == 0 then
        local z = mfl(rem / (x + y))
        table.insert(ans, x .. " " .. y .. " " .. z)
      end
    end
  end
end
print(#ans)
print(table.concat(ans, "\n"))