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superperfect number

positive integer which equals half of the sum of the divisors of the sum of its divisors
Thing Integer Sequence Q1164125

Facts

3 properties
Instance of
integer sequence
Defining formula
\sigma^2(n)=\sigma(\sigma(n))=2n[2]
Maintained by WikiProject
WikiProject Mathematics[3]
🏷️ Also known as
en superperfect number de superperfekte Zahl fa اعداد فوق کامل fr nombre superparfait hu szupertökéletes szám ja 超完全数 ko 우완전수 ru Суперсовершенное число sv superperfekt tal uk Високонадлишкове число zh 超完全數
🔖 Identifiers · 4
Freebase ID
/m/0411ysj
MathWorld ID
SuperperfectNumber
Microsoft Academic ID (discontinued)
177515526
OEIS ID
A019279

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🔗 Connections
Instance of 1
integer sequence
Maintained by WikiProject 1
WikiProject Mathematics
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Summary

superperfect number is an integer sequence[1].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

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APA 4ort.xyz Knowledge Graph. (2026). superperfect number. Retrieved November 10, 2026, from https://4ort.xyz/entity/superperfect-number
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BibTeX @misc{4ortxyz_superperfect-number_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{superperfect number}}, year = {2026}, url = {https://4ort.xyz/entity/superperfect-number}, note = {Accessed: 2026-11-10}}
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