A306682 - cp's OEIS frontend

A306682 a(n) = gcd(sigma(n), pod(n)) where sigma(k) = the sum of the divisors of k (A000203) and pod(k) = the product of the divisors of k (A007955).

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	12
7	1
8	1
9	1
10	2
11	1
12	4
13	1
14	4
15	3
16	1
17	1
18	3
19	1
20	2
21	1
22	4
23	1
24	12
25	1
26	2
27	1
28	56
29	1
30	72
31	1
32	1
33	3
34	2
35	1
36	1
37	1
38	4
39	1
40	10
41	1
42	48
43	1
44	4
45	3
46	4
47	1
48	4
49	1
50	1
51	9
52	2
53	1
54	24
55	1
56	8
57	1
58	2
59	1
60	24
61	1
62	4
63	1
64	1
65	1
66	144
67	1
68	2
69	3
70	16
71	1
72	3
73	1
74	2
75	1
76	4
77	1
78	24
79	1
80	2
81	1
82	2
83	1

[1, 1, 1, 1, 1, 12, 1, 1, 1, 2, 1, 4, 1, 4, 3, 1, 1, 3, 1, 2, 1, 4, 1, 12, 1, 2, 1, 56, 1, 72, 1, 1, 3, 2, 1, 1, 1, 4, 1, 10, 1, 48, 1, 4, 3, 4, 1, 4, 1, 1, 9, 2, 1, 24, 1, 8, 1, 2, 1, 24, 1, 4, 1, 1, 1, 144, 1, 2, 3, 16, 1, 3, 1, 2, 1, 4, 1, 24, 1, 2, 1, 2, 1]

cp's OEIS Frontend

A306682 a(n) = gcd(sigma(n), pod(n)) where sigma(k) = the sum of the divisors of k (A000203) and pod(k) = the product of the divisors of k (A007955).

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	12
7	1
8	1
9	1
10	2
11	1
12	4
13	1
14	4
15	3
16	1
17	1
18	3
19	1
20	2
21	1
22	4
23	1
24	12
25	1
26	2
27	1
28	56
29	1
30	72
31	1
32	1
33	3
34	2
35	1
36	1
37	1
38	4
39	1
40	10
41	1
42	48
43	1
44	4
45	3
46	4
47	1
48	4
49	1
50	1
51	9
52	2
53	1
54	24
55	1
56	8
57	1
58	2
59	1
60	24
61	1
62	4
63	1
64	1
65	1
66	144
67	1
68	2
69	3
70	16
71	1
72	3
73	1
74	2
75	1
76	4
77	1
78	24
79	1
80	2
81	1
82	2
83	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	12
7	1
8	1
9	1
10	2
11	1
12	4
13	1
14	4
15	3
16	1
17	1
18	3
19	1
20	2
21	1
22	4
23	1
24	12
25	1
26	2
27	1
28	56
29	1
30	72
31	1
32	1
33	3
34	2
35	1
36	1
37	1
38	4
39	1
40	10
41	1
42	48
43	1
44	4
45	3
46	4
47	1
48	4
49	1
50	1
51	9
52	2
53	1
54	24
55	1
56	8
57	1
58	2
59	1
60	24
61	1
62	4
63	1
64	1
65	1
66	144
67	1
68	2
69	3
70	16
71	1
72	3
73	1
74	2
75	1
76	4
77	1
78	24
79	1
80	2
81	1
82	2
83	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	12
7	1
8	1
9	1
10	2
11	1
12	4
13	1
14	4
15	3
16	1
17	1
18	3
19	1
20	2
21	1
22	4
23	1
24	12
25	1
26	2
27	1
28	56
29	1
30	72
31	1
32	1
33	3
34	2
35	1
36	1
37	1
38	4
39	1
40	10
41	1
42	48
43	1
44	4
45	3
46	4
47	1
48	4
49	1
50	1
51	9
52	2
53	1
54	24
55	1
56	8
57	1
58	2
59	1
60	24
61	1
62	4
63	1
64	1
65	1
66	144
67	1
68	2
69	3
70	16
71	1
72	3
73	1
74	2
75	1
76	4
77	1
78	24
79	1
80	2
81	1
82	2
83	1