Last Updated
：2025/11/29
sociable number
Noun
(number
theory)
Any
of
a
sequence
of
numbers
having
the
property
that
the
sum
of
the
divisors
of
each,
excluding
itself,
is
equal
to
the
next
number
in
the
sequence;
in
the
case
of
the
last
number
of
the
sequence,
the
sum
of
the
divisors,
excluding
that
number,
is
equal
to
the
first
number
of
the
sequence.
Japanese Meaning
数論において、ある数列内の各数について、その数自身を除く約数の和が次の数と一致し、数列の最後の数においては、その和が最初の数と一致するという性質を持つ数のこと。
Sense（1）
(number
theory)
Any
of
a
sequence
of
numbers
having
the
property
that
the
sum
of
the
divisors
of
each,
excluding
itself,
is
equal
to
the
next
number
in
the
sequence;
in
the
case
of
the
last
number
of
the
sequence,
the
sum
of
the
divisors,
excluding
that
number,
is
equal
to
the
first
number
of
the
sequence.
（ plural ）
Quizzes for review
(number theory) Any of a sequence of numbers having the property that the sum of the divisors of each, excluding itself, is equal to the next number in the sequence; in the case of the last number of the sequence, the sum of the divisors, excluding that number, is equal to the first number of the sequence.
音声機能が動作しない場合はこちらをご確認ください
See correct answer
sociable number
The mathematician explained how a sociable number fits into a cycle of integers where each term's proper divisors sum to the next.
See correct answer
The mathematician explained how a sociable number fits into a cycle of integers where each term's proper divisors sum to the next.
音声機能が動作しない場合はこちらをご確認ください
English - English
Word Edit Setting
- Users who have edit permission for words - All Users
- Screen new word creation
- Screen word edits
- Screen word deletion
- Screen the creation of new headword that may be duplicates
- Screen changing entry name
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Sentence Edit Setting
- Users who have edit permission for sentences - All Users
- Screen sentence deletion
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Quiz Edit Setting
- Users who have edit permission for quizzes - All Users
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
