A324987 - cp's OEIS frontend

A324987 a(n) = Product_{d|n} (tau(d)*sigma(d)) where tau(k) = the number of divisors of k (A000005) and sigma(k) = the sum of the divisors of k (A000203).

n	a(n)
1	1
2	6
3	8
4	126
5	12
6	2304
7	16
8	7560
9	312
10	5184
11	24
12	8128512
13	28
14	9216
15	9216
16	1171800
17	36
18	21026304
19	40
20	27433728
21	16384
22	20736
23	48
24	234101145600
25	1116
26	28224
27	49920
28	65028096
29	60
30	110075314176
31	64
32	442940400
33	36864
34	46656
35	36864
36	60754075619328
37	76
38	57600
39	50176

[1, 6, 8, 126, 12, 2304, 16, 7560, 312, 5184, 24, 8128512, 28, 9216, 9216, 1171800, 36, 21026304, 40, 27433728, 16384, 20736, 48, 234101145600, 1116, 28224, 49920, 65028096, 60, 110075314176, 64, 442940400, 36864, 46656, 36864, 60754075619328, 76, 57600, 50176]

cp's OEIS Frontend

A324987 a(n) = Product_{d|n} (tau(d)*sigma(d)) where tau(k) = the number of divisors of k (A000005) and sigma(k) = the sum of the divisors of k (A000203).

Table of values

List of values