A334491 - cp's OEIS frontend

A334491 a(n) = Product_{d|n} gcd(d, sigma(d)).

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	6
7	1
8	1
9	1
10	2
11	1
12	24
13	1
14	2
15	3
16	1
17	1
18	18
19	1
20	4
21	1
22	2
23	1
24	288
25	1
26	2
27	1
28	56
29	1
30	216
31	1
32	1
33	3
34	2
35	1
36	72
37	1
38	2
39	1
40	40
41	1
42	72
43	1
44	8
45	9
46	2
47	1
48	1152
49	1
50	2
51	3
52	4
53	1
54	108
55	1
56	448
57	1
58	2
59	1
60	20736
61	1
62	2
63	1
64	1
65	1
66	216
67	1
68	4
69	3
70	8
71	1
72	2592
73	1
74	2
75	3
76	8
77	1
78	72

[1, 1, 1, 1, 1, 6, 1, 1, 1, 2, 1, 24, 1, 2, 3, 1, 1, 18, 1, 4, 1, 2, 1, 288, 1, 2, 1, 56, 1, 216, 1, 1, 3, 2, 1, 72, 1, 2, 1, 40, 1, 72, 1, 8, 9, 2, 1, 1152, 1, 2, 3, 4, 1, 108, 1, 448, 1, 2, 1, 20736, 1, 2, 1, 1, 1, 216, 1, 4, 3, 8, 1, 2592, 1, 2, 3, 8, 1, 72]

cp's OEIS Frontend

A334491 a(n) = Product_{d|n} gcd(d, sigma(d)).

Table of values

List of values