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What is a deficient number?

In: Math and Arithmetic [Edit categories]

Answer:

A deficient number is a number with its proper factors equalling a lower number than itself.

First answer by Eman9405. Last edit by Eman9405. Contributor trust: 0 [recommend contributor ]. Question popularity: 3 [recommend question].

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Is the number 20 a deficient number?
No; 20 is an abundant number. S = {1, 2, 4, 5, 10} is the set of all positive divisors of 20, excluding itself.The sum of these divisors = 1+2+4+5+10=22 which is greater than 20.Therefore 20 is an...
Is deficient a number?
no. its a type of number. as in, a number can be deficient.
What are all the numbers from 1-150 that are Deficient numbers?
Here are some of them, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 21, 22, 23, 25, 26, 27, 29, 31, 32, 33, 34, 35, 37, 38, 39, 41, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 55, 57, 58, 59,...
Is 55 a deficient number or a abundant number?
abundant
Is 72 a abundant number or deficient number?
72 is an abundant number because the sum of its positive divisors, not including 72 itself, is larger than 72. Positive divisors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72. 1 + 2 + 3 + 4 +...