A225362 - cp's OEIS frontend

A225362 Numbers n with the property that there are integers k, h such that sigma(n) = k^tau(n) = tau(n)^h.

n	a(n)
1	1
2	3
3	217
4	3937
5	57337
6	917497
7	1040257
8	11010027
9	12189603
10	16252897
11	16646017
12	3612185689
13	4294434817
14	66571993057
15	68718821377
16	17590038552577
17	270545999761249
18	281472829095937
19	16138807601873739769
20	16140901064495857657
21	292842062170139131777
22	1208766717309082486038529

[1, 3, 217, 3937, 57337, 917497, 1040257, 11010027, 12189603, 16252897, 16646017, 3612185689, 4294434817, 66571993057, 68718821377, 17590038552577, 270545999761249, 281472829095937, 16138807601873739769, 16140901064495857657, 292842062170139131777, 1208766717309082486038529]

cp's OEIS Frontend

A225362 Numbers n with the property that there are integers k, h such that sigma(n) = k^tau(n) = tau(n)^h.

Table of values

List of values