A090777 - cp's OEIS frontend

A090777 Numbers k such that sigma(k) divides k^2.

n	a(n)
1	1
2	6
3	28
4	120
5	364
6	496
7	672
8	840
9	1080
10	1488
11	1782
12	2280
13	3276
14	3472
15	7440
16	8128
17	8736
18	11880
19	12400
20	18360
21	20832
22	24384
23	25296
24	26208
25	30240
26	30256
27	32760
28	35640
29	37200
30	56896
31	57240
32	84360
33	86800
34	90768
35	115560
36	121920
37	131040
38	149856
39	170688

[1, 6, 28, 120, 364, 496, 672, 840, 1080, 1488, 1782, 2280, 3276, 3472, 7440, 8128, 8736, 11880, 12400, 18360, 20832, 24384, 25296, 26208, 30240, 30256, 32760, 35640, 37200, 56896, 57240, 84360, 86800, 90768, 115560, 121920, 131040, 149856, 170688]

cp's OEIS Frontend

A090777 Numbers k such that sigma(k) divides k^2.

Table of values

List of values