No.
One has no proper factors.
some say it is others dont ussially though one is included as a proper factor
a proper factor is a factor.
No, a prime factor is a single factor that is a prime number. A proper factor is a member of the set of factors that doesn't include one and the number itself.
In the context of primes and factoriation, every counting number is a factor.
No. Prime numbers don't have proper factors.
It can be. 18 is a proper factor of 36.
It can be. 24 is a proper factor of 48.
It can be. 25 is a proper factor of 50.
It can be. 42 is a proper factor of 84.
It depends on the number being factored. 22 is a proper factor of 44. 22 is a factor, but not a proper factor, of 22.
No, prime numbers do not have proper factors.