x = gets.to_i
xn = x
n = 1
z = Array.new
if x == 1
    puts 1
    exit
end
while n * n <= x do
    if xn % n != 0
        n += 1
        next
    end
    c = a = x / n
    b = n
    while true do
        r = a % b
        if r == 0
            break
        end
        a = b
        b = r
    end
    w = x / b
    z.push((w / c) * (w / n))
    n += 1
end
print z.min