misc functions using factorization. (new in 0.5.0)
Return all factors divide n.
Return the list of primes that divides n.
This function using Algo. 1.7.5 in Cohen judges whether n is of the form p**k with prime p or not. If it is True, then (p,k) will be returned, otherwise (n,0).
Return the largest integer whose square divides n.