Statements (31)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
integer sequence
|
| gptkbp:appearsIn |
gptkb:OEIS
|
| gptkbp:author |
gptkb:N._J._A._Sloane
|
| gptkbp:citation |
gptkb:A001157
A000010 |
| gptkbp:describes |
Sum of divisors of n, or sigma(n), or σ(n).
|
| gptkbp:eighth_term |
15
|
| gptkbp:field |
number theory
|
| gptkbp:fifthBook |
6
|
| gptkbp:first_terms |
1
3 |
| gptkbp:form |
a(n) = sum of divisors of n
|
| gptkbp:fourthPlace |
7
|
| gptkbp:hasKeyword |
easy
nonn mult |
| https://www.w3.org/2000/01/rdf-schema#label |
A000203
|
| gptkbp:mathematical_function |
sum of divisors
sigma(n) |
| gptkbp:name |
Sum of divisors function
|
| gptkbp:ninth_term |
13
|
| gptkbp:OEIS |
gptkb:A000203
|
| gptkbp:related_sequence |
gptkb:A001157
A000010 |
| gptkbp:sequence |
multiplicative function
|
| gptkbp:seventhBook |
8
|
| gptkbp:sixthBook |
12
|
| gptkbp:tenth_term |
18
|
| gptkbp:thirdPlace |
4
|
| gptkbp:bfsParent |
gptkb:A000010_(OEIS)
|
| gptkbp:bfsLayer |
7
|