Question

Given, $f\left(x\right)=$ sum of all natural numbers which can divide $x$ completely, then find : $f\left(14\right)$.

Answer 1

Given, $f\left(x\right)=$ sum of all natural numbers which can divide $x$ completely.

$f\left(14\right)=$ Sum of all natural numbers which can divide $14$ completely,

Divisors of $14$ are $1,2,7,14$.

$\Rightarrow f\left(14\right)=1+2+7+14=24$