1.
Let f(x)=2x3+λf(x) = 2x^3 + \lambda, λR\lambda \in \mathbb{R}, and f(4)=133f(4) = 133, f(5)=255f(5) = 255. Then the sum of all the positive integer divisors of (f(3)f(2))(f(3) - f(2)) is