If the sum of the cubes of the first $n$ natural numbers is $441$, the value of $1 + 2 + 3 + \cdots + n$ is —

Question

Accepted Answer

$21$

Answer

$36$

Answer

$28$

Answer

$15$

If the sum of the cubes of the first nnn natural numbers is 441441441, the value of 1+2+3+⋯+n1 + 2 + 3 + \cdots + n1+2+3+⋯+n is —