Deficient number
WiktionaryText
Noun
- A number that greater than the sum of all of its divisors except itself.
- The factors of 22 are 1, 2 and 11 and 22, and 1 + 2 + 11 = 14, which is less than 22, so 22 is a deficient number.
See also
- abundant number
- amicable numbers
- sociable numbers
- perfect number
- Wikipedia article on abundant numbers