A344480 - cp's OEIS frontend

A344480 a(n) = Sum_{d|n} d * sigma_d(d), where sigma_k(n) is the sum of the k-th powers of the divisors of n.

n	a(n)
1	1
2	11
3	85
4	1103
5	15631
6	284795
7	5764809
8	134745175
9	3486961642
10	100097682141
11	3138428376733
12	107019534806039
13	3937376385699303
14	155577590686826319
15	6568408813691811835
16	295152408847835466855
17	14063084452067724991027
18	708238048886862707907062
19	37589973457545958193355621
20	2097154000001929438984022793

[1, 11, 85, 1103, 15631, 284795, 5764809, 134745175, 3486961642, 100097682141, 3138428376733, 107019534806039, 3937376385699303, 155577590686826319, 6568408813691811835, 295152408847835466855, 14063084452067724991027, 708238048886862707907062, 37589973457545958193355621, 2097154000001929438984022793]

cp's OEIS Frontend

A344480 a(n) = Sum_{d|n} d * sigma_d(d), where sigma_k(n) is the sum of the k-th powers of the divisors of n.

Table of values

List of values