A333639 - cp's OEIS frontend

A333639 Numbers m such that g(m) = (m * tau(m) / sigma(m)), h(m) = (m * sigma(m)) / tau(m) and k(m) = (tau(m) * sigma(m)) / m are all integers.

n	a(n)
1	1
2	6
3	672
4	1638
5	30240
6	32760
7	2178540
8	17428320
9	23569920
10	29410290
11	45532800
12	714954240
13	1379454720
14	14182439040
15	19209881600
16	30600708096
17	51001180160
18	57575890944
19	57629644800
20	153003540480
21	206166804480
22	403031236608
23	465036042240
24	482476262400

[1, 6, 672, 1638, 30240, 32760, 2178540, 17428320, 23569920, 29410290, 45532800, 714954240, 1379454720, 14182439040, 19209881600, 30600708096, 51001180160, 57575890944, 57629644800, 153003540480, 206166804480, 403031236608, 465036042240, 482476262400]

cp's OEIS Frontend

A333639 Numbers m such that g(m) = (m * tau(m) / sigma(m)), h(m) = (m * sigma(m)) / tau(m) and k(m) = (tau(m) * sigma(m)) / m are all integers.

Table of values

List of values