FactorInteger

FactorInteger[n] factors the integer n.

Attributes[FactorInteger] := {Listable, Protected}

Simple examples

In[1]:= FactorInteger[8]
Out[1]= {{2, 3}}

In[2]:= FactorInteger[Rational[-15, 2]]
Out[2]= {{-1, 1}, {2, -1}, {3, 1}, {5, 1}}