An obligation binding several creditors or debtors is divided between them by operation of law. The division also takes place between their successors, the obligation being joint and several. If it is not otherwise regulated by law or by contract, the division takes place by equal shares.
Each of the creditors is entitled only to his share of the common claim; each of the debtors is liable only for his share of the common debt.
This is different, in relations between creditors and debtors, only if the obligation is joint and several or if the benefit due is indivisible.