A067718 - cp's OEIS frontend

A067718 Numbers k such that sigma(2^k+1) == 0 (mod k).

n	a(n)
1	1
2	2
3	6
4	12
5	24
6	36
7	42
8	70
9	126
10	132
11	144
12	168
13	210
14	225
15	252
16	336
17	344
18	378
19	385
20	396
21	462
22	504
23	528
24	546
25	560
26	561
27	576
28	627
29	630
30	660
31	672
32	693
33	714
34	798
35	896
36	924
37	930
38	945
39	960
40	1001
41	1008
42	1012
43	1032
44	1050
45	1116

[1, 2, 6, 12, 24, 36, 42, 70, 126, 132, 144, 168, 210, 225, 252, 336, 344, 378, 385, 396, 462, 504, 528, 546, 560, 561, 576, 627, 630, 660, 672, 693, 714, 798, 896, 924, 930, 945, 960, 1001, 1008, 1012, 1032, 1050, 1116]

cp's OEIS Frontend

A067718 Numbers k such that sigma(2^k+1) == 0 (mod k).

Table of values

List of values