What is the opposite of the word multiple?

What is the opposite of the word multiple?
single

I am not sure that this is the opposite. A multiple is by nature a single or more, multiplied.

When I sought the answer to the question, "What is the opposite of multiple?" I was looking for a word like "dividal" because the real opposite of "to multiply" would be "to divide", but it seems that word doesn't exist (yet).

What about "dividend"?

However "single" may have been the answer the original enquirer sought.