Function: numdiv
Section: number_theoretical
C-Name: gnumbdiv
Prototype: G
Help: numdiv(x): number of divisors of x.
Description:
 (int):int        numbdiv($1)
 (gen):gen        gnumbdiv($1)
Doc: number of divisors of $|x|$. $x$ must be of type integer.
 The function accepts vector/matrices arguments, and is then applied
 componentwise.
Variant: If $x$ is a \typ{INT}, one may use \fun{GEN}{numbdiv}{GEN n} directly.

