2, 3, 6 and 9
It can be. 18 is a proper factor of 36.
Yes 18 times 2 equals 36 It is a factor, not a [proper] multiple.
2, 3, 6, 9, 18, 27
a proper factor is a factor.
2, 3, 4, 6, 9, 12, 18
2, 3, 4, 6, 9, 12, 18
No. Prime numbers don't have proper factors.
2, 3, 4, 6, 8, 9, 12, 18, 24, 36
No, 18 is a multiple of 6. 6 is a factor of 18.
72 is not a factor of 18; 18 is a factor of 72.
The concept of a factor makes proper sense only in the context of integers. Otherwise, any non-zero number can be factor of any other number. For example, radical 7 is a factor of radical 18 since radical(180) = radical(7) * radical (18/7)
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.