|
|
|
|
|
Semiperfect NumberIn mathematics, a semiperfect number or pseudoperfect number is a natural number n that is equal to the sum of all or some of its proper divisors. The first few semiperfect numbers are 6, 12, 18, 20, 24, 28, 30, 36, 40, ... ; every multiple of a semiperfect number is semiperfect, and every number of the form 2mp for a natural number m and a prime number p such that 2m < p < 2m + 1 is also semiperfect. A semiperfect number that is equal to the sum of all its proper divisors is called a perfect number; an abundant number which is not semiperfect is called a weird number. See also External link
|
 |
|
| Copyright 2005-2009 OnPedia.com. All Rights Reserved |
|
|