impractical number
An impractical number is an even abundant number that is not a practical number under the second definition. The first few impractical numbers are 70, 102, 114, 138, 174, 186, 222, 246, 258, 282, 318, 350, 354, 366, 372, 402, 426, 438, 444, 474, 490, 492, 498; these are listed in A007621 of Sloane’s OEIS.
| Title | impractical number |
|---|---|
| Canonical name | ImpracticalNumber |
| Date of creation | 2013-03-22 18:07:06 |
| Last modified on | 2013-03-22 18:07:06 |
| Owner | PrimeFan (13766) |
| Last modified by | PrimeFan (13766) |
| Numerical id | 4 |
| Author | PrimeFan (13766) |
| Entry type | Definition |
| Classification | msc 11A25 |
| Related topic | PracticalNumber2 |