Super Unitary Perfect Number
المؤلف:
Sloane, N. J. A
المصدر:
Sequence A038843 in "The On-Line Encyclopedia of Integer Sequences."
الجزء والصفحة:
...
1-12-2020
1103
Super Unitary Perfect Number
An integer 
is called a super unitary perfect number if
where 
is the unitary divisor function. The first few are 2, 9, 165, 238, 1640, ... (OEIS A038843). It is not known if there exist any odd super unitary perfect numbers other than 9 and 165 (Yamada 2008).
REFERENCES:
Sloane, N. J. A. Sequence A038843 in "The On-Line Encyclopedia of Integer Sequences."
Yamada, T. "Unitary Super Perfect Numbers." Math. Pannon. 19, 37-47, 2008.
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