A280387 - cp's OEIS frontend

A280387 Composite numbers n such that sum of proper divisors of n divides sum of proper divisors of n^n.

n	a(n)
1	4
2	8
3	9
4	16
5	21
6	25
7	27
8	32
9	36
10	45
11	49
12	64
13	81
14	87
15	91
16	99
17	121
18	125
19	128
20	144
21	169
22	196
23	217
24	243
25	256
26	289
27	325
28	343
29	361
30	400
31	417
32	481
33	512
34	529
35	559
36	625
37	685
38	697
39	703
40	721
41	729
42	745
43	749
44	775
45	801
46	841
47	925
48	931
49	961
50	1024
51	1156
52	1157
53	1261
54	1331

[4, 8, 9, 16, 21, 25, 27, 32, 36, 45, 49, 64, 81, 87, 91, 99, 121, 125, 128, 144, 169, 196, 217, 243, 256, 289, 325, 343, 361, 400, 417, 481, 512, 529, 559, 625, 685, 697, 703, 721, 729, 745, 749, 775, 801, 841, 925, 931, 961, 1024, 1156, 1157, 1261, 1331]

cp's OEIS Frontend

A280387 Composite numbers n such that sum of proper divisors of n divides sum of proper divisors of n^n.

Table of values

List of values