Abundant number

An abundant number is a number for which its sum of divisors is greater than . 12 is an abundant number because .
18 is also an abundant number because . The series is in the Online Encyclopedia of Integer Sequences (Sloane) as . 945 is the first odd abundant number.
If a number is not abundant, it is called either deficient or perfect.
List of abundant numbers.
List of the first 90 abundant numbers: