A338172 - cp's OEIS frontend

A338172 a(n) is the product of those divisors d of n such that tau(d) divides sigma(d).

n	a(n)
1	1
2	1
3	3
4	1
5	5
6	18
7	7
8	1
9	3
10	5
11	11
12	18
13	13
14	98
15	225
16	1
17	17
18	18
19	19
20	100
21	441
22	242
23	23
24	18
25	5
26	13
27	81
28	98
29	29
30	40500
31	31
32	1
33	1089
34	17
35	1225
36	18
37	37
38	722
39	1521
40	100
41	41
42	1555848
43	43
44	10648
45	10125
46	1058
47	47
48	18
49	343
50	5
51	2601
52	13
53	53
54	26244
55	3025
56	5488
57	3249
58	29

[1, 1, 3, 1, 5, 18, 7, 1, 3, 5, 11, 18, 13, 98, 225, 1, 17, 18, 19, 100, 441, 242, 23, 18, 5, 13, 81, 98, 29, 40500, 31, 1, 1089, 17, 1225, 18, 37, 722, 1521, 100, 41, 1555848, 43, 10648, 10125, 1058, 47, 18, 343, 5, 2601, 13, 53, 26244, 3025, 5488, 3249, 29]

cp's OEIS Frontend

A338172 a(n) is the product of those divisors d of n such that tau(d) divides sigma(d).

Table of values

List of values