Function liouville 

pub fn liouville(n: u64) -> i32

Liouville function lambda(n): (-1)^Omega(n) where Omega(n) = total number of prime factors with multiplicity.

Examples

use mathverse_core::integer::liouville;

assert_eq!(liouville(1), 1);
assert_eq!(liouville(6), 1);
assert_eq!(liouville(8), -1);