The sum of the first n even, positive integers is 2 + 4 + 6 + ..... 2n

The sum of the first n even, positive integers is \(2 + 4 + 6 + ..... 2n\) is \(n(n + 1)\). What is the sum of the first 20 even, positive integers?

(A) 120
(B) 188
(C) 362
(D) 406
(E) 420

Source: Nova GMAT