You can indeed say ego sum X for "I am X".
This, especially repeated, gives a lot of emphasis, but that is not inappropriate here.
The X should be a noun, an adjective, or something else that can be used as a predicative.
A personal form of a verb cannot be used as a predicative, so ego sum divitur is ungrammatical, much like "I am it is divided".
Instead, I recommend the participle divisus, "divided".
With the mentioned change your choice of words sounds appropriate.
The correct form depends on who speaks.
If the speaker is a male, a female, or an inanimate thing, you need the predicatives (none of which are nouns here) to be in masculine, feminine, or neuter, respectively.
This leads to three options:
Ego sum divisus/divisa/divisum. Ego sum libratus/librata/libratum. Ego sum unus/una/unum.
If an implicit noun is understood, as in ego sum [machina] divisa, then the grammatical gender of the predicatives should match that of the noun.
The exact answer, as it often does, depends on the intended use context.