Please enter a number between 2 and 239 [inclusive].
The isomorphism classes of your number will then be listed.
(You can also simply hit "Find Groups" to have a number chosen at random.)

164 = 2² * 41
Thus there are two nonisomorphic abelian groups of order 164,
(1) Z₂ ⊕ Z₈₂
(2) Z₁₆₄