Function: omega
Section: number_theoretical
C-Name: omega
Prototype: lG
Help: omega(x): number of distinct prime divisors of x.
Doc: number of distinct prime divisors of $|x|$. $x$ must be of type integer.
\bprog
? factor(392)
%1 =
[2 3]
[7 2]
? omega(392)
%2 = 2; \\ without multiplicity
? bigomega(392)
%3 = 5; \\ = 3+2, with multiplicity
@eprog