Deficient number definitions

Deficient number

In number theory, a deficient or deficient number is a number n for which the sum of divisors σ(n)
Found on http://en.wikipedia.org/wiki/Deficient_number

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deficient number

(from the article `number game`) ...`abundant` or `deficient.` In an abundant number, the sum of its proper divisors (i.e., including 1 but excluding the number itself) is greater ...
Found on http://www.britannica.com/eb/a-z/d/24

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Deficient Number

A positive integer that is larger than the sum of its proper divisors. See also: Abundant Number, Divisor, Integer.
Found on https://www.encyclo.co.uk/local/20687

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deficient number

a positive number that is greater than the sum of all positive integers that are submultiples of it, as 10, which is greater than the sum of 1, 2, and 5. Also calledCf. abundant number, perfect number.
Found on https://www.infoplease.com/dictionary/deficient-number

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