Those numbers are called abundant.
Abundant is a number for which the sum of all its proper factors is greater than the number itself. Deficient is a number for which the sum of all its proper factors is less than the number itself. Perfect is a number for which the sum of all its proper factors is the number itself.
"Proper factors" are all of a number's factors except one and the number itself.
All even numbers greater than 2 have even proper factors, since they all have 2 as a proper factor.
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.
5 is a prime number so it doesn't have proper factors
Proper factors are the set of all the factors minus 1 and the number you are factoring.
That is one definition of the set of proper factors.
All factors except the number itself or unity are "proper factors", the excluded ones being tautological.
The proper factors of a number are all the factors less than itself, so the proper factors of 126 are 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, and 63. In some cases, the number 1 is excluded from the list of proper factors, too.
A perfect number is a number that is the sum of all its proper factors (that is all its factors excluding itself). The next perfect number after 28 is 496
That is one definition of the set of proper factors.
There are three equivalent definitions for an abundant number.A number is abundant if:the sum of all its factors (including itself) is more than double the number;the sum of all factors of the number which are smaller than the number, must be more than the number;the sum of all proper factors of the number must be at least as large as the number.