1.
If you divide something up, you separate it into smaller or more useful groups.
The idea is to ~ the country into four sectors...
The Trust needs a new law to divide it up into smaller bodies.
= split up
PHRASAL VERB: V P n (not pron) into pl-n, V n P into pl-n
2.
If you divide something up, you share it out among a number of people or groups in approximately equal parts.
The aim was to ~ the business, give everyone an equal stake in its future.
PHRASAL VERB: V P n (not pron)