Definition:Unitary Perfect Number
Jump to navigation
Jump to search
Definition
A unitary perfect number is a positive integer which equals the sum of its positive unitary divisors apart from itself.
Sequence of Unitary Perfect Numbers
The sequence of unitary perfect numbers begins:
- $6, 60, 90, 87 \, 360, 146 \, 361 \, 946 \, 186 \, 458 \, 562 \, 560 \, 000, \ldots$
It is not known whether this sequence is complete.
Sources
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $87,360$