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find me an integer that isn't divisible by 1.
what do you mean?This is a contradiction in itself. ##1## is a unit.
No. Why would you think it is?Is every integer derived from 1?
The statement that "1 is a unit" comes from a generalization of the notions of addition and multiplication into abstract "rings" The notions of divisibility and of being a "prime number" can apply to such structures. The notion of a "unit" is also definable.what do you mean?
Have you learned about Peano's Axioms yet? If not, I think you will enjoy reading about them:find me an integer that isn't divisible by 1.