If you are Diane Clement, the seed managger for the Alpine Garden Society and Hepatica afficinado, then dead easy. If you are me then well nigh impossible. Take your pick. In theory as I said fresh seed germinates like cresstard and muss. Wish it did for me. I usually manage to get enough self sown ones from round my plants in the garden to spread elsewhere though.
Splitting plants is possible, but again not something I have ever really tried to do.