A229883 - cp's OEIS frontend

A229883 Numbers k such that Sum_{j=1..k} sigma_(j) == 0 (mod k), where sigma_(j) is the sum of the anti-divisors of j (A066417).

n	a(n)
1	1
2	2
3	5
4	8
5	11
6	30
7	34
8	172
9	311
10	498
11	562
12	602
13	630
14	1742
15	4608
16	4842
17	13664
18	16386
19	24659
20	29150
21	56357
22	58185
23	86267
24	88114
25	242156
26	245325
27	839756
28	947942
29	2524087
30	2963552
31	4218803
32	18281326
33	28292036
34	30023108
35	46376824
36	52058844
37	85990503
38	139548984

[1, 2, 5, 8, 11, 30, 34, 172, 311, 498, 562, 602, 630, 1742, 4608, 4842, 13664, 16386, 24659, 29150, 56357, 58185, 86267, 88114, 242156, 245325, 839756, 947942, 2524087, 2963552, 4218803, 18281326, 28292036, 30023108, 46376824, 52058844, 85990503, 139548984]

cp's OEIS Frontend

A229883 Numbers k such that Sum_{j=1..k} sigma_(j) == 0 (mod k), where sigma_(j) is the sum of the anti-divisors of j (A066417).

Table of values

List of values

cp's OEIS Frontend

A229883 Numbers k such that Sum_{j=1..k} sigma_*(j) == 0 (mod k), where sigma_*(j) is the sum of the anti-divisors of j (A066417).

Table of values

List of values

A229883 Numbers k such that Sum_{j=1..k} sigma_(j) == 0 (mod k), where sigma_(j) is the sum of the anti-divisors of j (A066417).