countable
YES. Every counting number is an integer.
In the context of primes and factoriation, every counting number is a factor.
Every counting number IS an integer.
No. 3.6427 is real and rational, but not a counting number.
1 is a factor of every number.1 is a factor of every number.
No. In fact, every number counting by 90, including 90 itself, is composite.
One is a factor of every number.
Yes, it is.
yes
yes it is
yes it is a factor for every number.