x = gets.to_i
n = Math.sqrt(x).to_i
r = x % n
while true do
    if x % n == 0
        break
    end
    n -= 1
end
a = x / n 
b = n
while true do
    r = a % b
    if r == 0
        break
    end
    a = b
    b = r
end
w = x / b
puts (w / (x / n)) * (w / n)