English

Noun

deficient number ‎(plural deficient numbers)

1. (number theory) 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.

Synonyms

• defective number

Translations

See also

• abundant number
• amicable numbers
• sociable numbers
• perfect number
• Wikipedia article on abundant numbers