A067313 - cp's OEIS frontend

A067313 Numbers k such that sigma_k(k)/k is an integer, where sigma_k(k) is the sum of the k-th powers of the divisors of k (A023887).

n	a(n)
1	1
2	10
3	130
4	135
5	147
6	150
7	228
8	250
9	350
10	364
11	410
12	444
13	492
14	876
15	891
16	945
17	1014
18	1308
19	1372
20	1550
21	1690
22	1950
23	2050
24	2210
25	2373
26	2565
27	2850
28	3045
29	3050
30	3250
31	3375
32	3876
33	4108
34	4185
35	4905
36	4995
37	5050
38	5070
39	5145
40	5330
41	5439
42	5481
43	6150
44	6250
45	6321
46	6615
47	6890
48	7514

[1, 10, 130, 135, 147, 150, 228, 250, 350, 364, 410, 444, 492, 876, 891, 945, 1014, 1308, 1372, 1550, 1690, 1950, 2050, 2210, 2373, 2565, 2850, 3045, 3050, 3250, 3375, 3876, 4108, 4185, 4905, 4995, 5050, 5070, 5145, 5330, 5439, 5481, 6150, 6250, 6321, 6615, 6890, 7514]

cp's OEIS Frontend

A067313 Numbers k such that sigma_k(k)/k is an integer, where sigma_k(k) is the sum of the k-th powers of the divisors of k (A023887).

Table of values

List of values