A091911 - cp's OEIS frontend

A091911 a(n) = smallest number m such that m*tau(m)/sigma(m) = n, or 0 if no such m exists.

n	a(n)
1	1
2	6
3	28
4	0
5	140
6	270
7	8128
8	672
9	1638
10	6200
11	2970
12	0
13	105664
14	18620
15	8190
16	0
17	27846
18	0
19	117800
20	0
21	55860
22	0
23	0
24	30240
25	173600
26	242060
27	167400
28	0
29	237510
30	0
31	2305843008139952128
32	0
33	0
34	0
35	2229500
36	0
37	4358600
38	0
39	726180
40	0
41	2290260
42	1089270

[1, 6, 28, 0, 140, 270, 8128, 672, 1638, 6200, 2970, 0, 105664, 18620, 8190, 0, 27846, 0, 117800, 0, 55860, 0, 0, 30240, 173600, 242060, 167400, 0, 237510, 0, 2305843008139952128, 0, 0, 0, 2229500, 0, 4358600, 0, 726180, 0, 2290260, 1089270]

cp's OEIS Frontend

A091911 a(n) = smallest number m such that m*tau(m)/sigma(m) = n, or 0 if no such m exists.

Table of values

List of values