An integer d is a divisor of a ⇔ ____ | ____.
Equivalently, d is a divisor of a ⇔ ____ mod ____ = _____.
Is it possible for a divisor of a to be bigger than a?
The first blank would be d|a, and I am not sure about the second.
And for the third question, I believe so. But I am not sure how to explain why.