Proper factors are just like regular factors, except they don't include 1 and the number itself.
No. Some proper factors are prime.
One has no proper factors.
1 doesn't have proper factors.
No, no prime number has proper factors.
Proper factors do not include one and the number itself.
Prime numbers don't have proper factors.
The proper factors of 26 are 2 and 13
Prime numbers don't have proper factors.
Prime numbers don't have proper factors.
The proper factors of 22 are 2 and 11.
Prime numbers don't have proper factors.
Zero doesn't have any proper factors.