A105402 - cp's OEIS frontend

A105402 Positive integers k such that the prime factors of sigma(k) are a subset of the prime factors of k.

n	a(n)
1	1
2	6
3	28
4	30
5	42
6	66
7	84
8	102
9	120
10	138
11	186
12	210
13	270
14	282
15	318
16	330
17	364
18	420
19	426
20	462
21	496
22	510
23	546
24	570
25	642
26	672
27	690
28	714
29	762
30	840
31	868
32	870
33	924
34	930
35	966
36	1080
37	1092
38	1122
39	1146
40	1302
41	1320
42	1410
43	1428
44	1488
45	1518
46	1590
47	1638
48	1722
49	1770
50	1782
51	1890

[1, 6, 28, 30, 42, 66, 84, 102, 120, 138, 186, 210, 270, 282, 318, 330, 364, 420, 426, 462, 496, 510, 546, 570, 642, 672, 690, 714, 762, 840, 868, 870, 924, 930, 966, 1080, 1092, 1122, 1146, 1302, 1320, 1410, 1428, 1488, 1518, 1590, 1638, 1722, 1770, 1782, 1890]

cp's OEIS Frontend

A105402 Positive integers k such that the prime factors of sigma(k) are a subset of the prime factors of k.

Table of values

List of values