Fatsias tend to create new stems from the crown, so can't imagine you'd be able to divide it, but can't really see clearly with that photo. Also worth noting they're much happier out of doors and in the ground. It's frustrating they're too frequently sold as house plants. They are perfectly hardy in the UK except for frost damage to leaves at times.
Posts
didn’t know i can plant it outside
@amancalledgeorge