A339472 - cp's OEIS frontend

A339472 Integers k for which there is a divisor d, such that sigma(k) = d*sigma(d).

n	a(n)
1	1
2	6
3	12
4	28
5	30
6	56
7	117
8	120
9	132
10	140
11	182
12	306
13	380
14	496
15	552
16	672
17	775
18	870
19	992
20	1080
21	1287
22	1406
23	1428
24	1680
25	1722
26	1892
27	2016
28	2184
29	2256
30	2480
31	2793
32	2862
33	3276
34	3540
35	3640
36	3782
37	3960
38	4060
39	4556
40	4560
41	4650
42	5112
43	5382
44	5402
45	5460
46	6120
47	6320
48	6552

[1, 6, 12, 28, 30, 56, 117, 120, 132, 140, 182, 306, 380, 496, 552, 672, 775, 870, 992, 1080, 1287, 1406, 1428, 1680, 1722, 1892, 2016, 2184, 2256, 2480, 2793, 2862, 3276, 3540, 3640, 3782, 3960, 4060, 4556, 4560, 4650, 5112, 5382, 5402, 5460, 6120, 6320, 6552]

cp's OEIS Frontend

A339472 Integers k for which there is a divisor d, such that sigma(k) = d*sigma(d).

Table of values

List of values