divis takes as argument a polynomial (or a list of
polynomials) and returns the list
of the divisors of the polynomial(s).
Input :
^4-1)Output :
^2+1,x+1,(x^2+1)*(x+1),x-1,(x^2+1)*(x-1),^2+1)*(x+1)*(x-1)]Input :
^2,x^2-1])Output :
^2],[1,x+1,x-1,(x+1)*(x-1)]]