The mortgage is indivisible, notwithstanding the division of the debt: the co-debtor who owns the mortgaged immovable is, on that immovable, held for the whole; each of the creditors has the whole immovable as security for his share in the debt.
The mortgage is still indivisible, notwithstanding the division of the immovable or the plurality of immovables: each part of the divided immovable, each of the immovables is assigned to the security of the entire debt.