bn:02573858n
Noun Concept
Categories: Integer sequences, Divisor function, Arithmetic dynamics
EN
deficient number  defective number  deficient numbers
EN
In number theory, a deficient number or defective number is a number n for which the sum of divisors of n is less than 2n. Wikipedia
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EN
In number theory, a deficient number or defective number is a number n for which the sum of divisors of n is less than 2n. Wikipedia
Natural integer number for which the sum of its proper strict divisors is less than the number itself Wikidata
A number that is greater than the sum of all of its divisors except itself. Wiktionary
Deficient number. Wiktionary (translation)
EN
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. Wiktionary
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