A369904 - cp's OEIS frontend

A369904 a(n) = n * Sum_{p|n, p prime} sigma(n/p) / p.

n	a(n)
1	0
2	1
3	1
4	6
5	1
6	18
7	1
8	28
9	12
10	36
11	1
12	100
13	1
14	62
15	42
16	120
17	1
18	189
19	1
20	208
21	68
22	138
23	1
24	456
25	30
26	188
27	117
28	364
29	1
30	612
31	1
32	496
33	144
34	312
35	86
36	1038
37	1
38	386
39	194
40	960
41	1
42	1080
43	1
44	820
45	477
46	558
47	1
48	1936
49	56
50	955
51	318
52	1120
53	1
54	1782
55	162
56	1688
57	392
58	876
59	1
60	3336
61	1
62	998
63	789

[0, 1, 1, 6, 1, 18, 1, 28, 12, 36, 1, 100, 1, 62, 42, 120, 1, 189, 1, 208, 68, 138, 1, 456, 30, 188, 117, 364, 1, 612, 1, 496, 144, 312, 86, 1038, 1, 386, 194, 960, 1, 1080, 1, 820, 477, 558, 1, 1936, 56, 955, 318, 1120, 1, 1782, 162, 1688, 392, 876, 1, 3336, 1, 998, 789]

cp's OEIS Frontend

A369904 a(n) = n * Sum_{p|n, p prime} sigma(n/p) / p.

Table of values

List of values