A076231 - cp's OEIS frontend

A076231 Numbers k such that sigma(k)/k, sigma_3(k)/k and sigma_5(k)/k are all integers.

n	a(n)
1	1
2	6
3	120
4	672
5	8128
6	30240
7	32760
8	33550336
9	459818240
10	1379454720
11	1476304896
12	8589869056
13	31998395520
14	51001180160
15	66433720320
16	137438691328
17	153003540480
18	403031236608
19	30823866178560
20	796928461056000
21	6088728021160320
22	14942123276641920
23	212517062615531520

[1, 6, 120, 672, 8128, 30240, 32760, 33550336, 459818240, 1379454720, 1476304896, 8589869056, 31998395520, 51001180160, 66433720320, 137438691328, 153003540480, 403031236608, 30823866178560, 796928461056000, 6088728021160320, 14942123276641920, 212517062615531520]

cp's OEIS Frontend

A076231 Numbers k such that sigma(k)/k, sigma_3(k)/k and sigma_5(k)/k are all integers.

Table of values

List of values