A334806 - cp's OEIS frontend

A334806 a(n) = Product_{d|n} lcm(tau(d), sigma(d)) where tau(k) is the number of divisors of k (A000005) and sigma(k) is the sum of divisors of k (A000203).

n	a(n)
1	1
2	6
3	4
4	126
5	6
6	288
7	8
8	7560
9	156
10	1296
11	12
12	508032
13	14
14	1152
15	576
16	1171800
17	18
18	876096
19	20
20	1143072
21	1024
22	2592
23	24
24	3657830400
25	558
26	7056
27	6240
28	4064256
29	30
30	107495424
31	32
32	147646800
33	2304
34	11664
35	2304
36	1265709908736
37	38
38	7200
39	3136
40	24690355200
41	42

[1, 6, 4, 126, 6, 288, 8, 7560, 156, 1296, 12, 508032, 14, 1152, 576, 1171800, 18, 876096, 20, 1143072, 1024, 2592, 24, 3657830400, 558, 7056, 6240, 4064256, 30, 107495424, 32, 147646800, 2304, 11664, 2304, 1265709908736, 38, 7200, 3136, 24690355200, 42]

cp's OEIS Frontend

A334806 a(n) = Product_{d|n} lcm(tau(d), sigma(d)) where tau(k) is the number of divisors of k (A000005) and sigma(k) is the sum of divisors of k (A000203).

Table of values

List of values