A325023 - cp's OEIS frontend

A325023 Multi-perfect numbers m from A007691 such that m*(m-tau(m))/sigma(m) is an integer h, where k-tau(k) is the number of nondivisors of k (A049820) and sigma(k) is the sum of the divisors of k (A000203).

n	a(n)
1	1
2	6
3	28
4	496
5	672
6	8128
7	30240
8	32760
9	2178540
10	23569920
11	33550336
12	45532800
13	142990848
14	1379454720
15	8589869056
16	14182439040
17	43861478400
18	66433720320
19	137438691328
20	153003540480
21	403031236608
22	704575228896
23	13661860101120
24	181742883469056
25	6088728021160320

[1, 6, 28, 496, 672, 8128, 30240, 32760, 2178540, 23569920, 33550336, 45532800, 142990848, 1379454720, 8589869056, 14182439040, 43861478400, 66433720320, 137438691328, 153003540480, 403031236608, 704575228896, 13661860101120, 181742883469056, 6088728021160320]

cp's OEIS Frontend

A325023 Multi-perfect numbers m from A007691 such that m*(m-tau(m))/sigma(m) is an integer h, where k-tau(k) is the number of nondivisors of k (A049820) and sigma(k) is the sum of the divisors of k (A000203).

Table of values

List of values