The proper factors are the regular factors without one and the number itself.
Proper factors do not include one and the number itself.
The proper factors of a number do not include one and the number itself.
"Proper factors" are all of a number's factors except one and the number itself.
the proper factors are the factors of a number not including the number itself, or 1.
No, no prime number has proper factors.
One has no proper factors.
Proper factors don't include one and the number itself.
The set of factors includes one and the number itself. Proper factors do not include those two.
the difference between a subset and a proper subset
The factors of 9 are 1, 3 and 9. The proper factor of 9 is 3.
39 is a composite number whose proper factors add up to 16.
Proper factors of a number do not include 1 or the number itself. For example, all of the factors of 6 are 1, 2, 3, and 6, but the proper factors of 6 are 2 and 3.