A348028 - cp's OEIS frontend

A348028 Greatest common divisor of A003415 (arithmetic derivative) and sigma, the sum of divisors function.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	3
9	1
10	1
11	1
12	4
13	1
14	3
15	8
16	1
17	1
18	3
19	1
20	6
21	2
22	1
23	1
24	4
25	1
26	3
27	1
28	8
29	1
30	1
31	1
32	1
33	2
34	1
35	12
36	1
37	1
38	3
39	8
40	2
41	1
42	1
43	1
44	12
45	39
46	1
47	1
48	4
49	1
50	3
51	4
52	14
53	1
54	3
55	8
56	4
57	2
58	1
59	1
60	4
61	1
62	3
63	1
64	1
65	6
66	1
67	1
68	18
69	2
70	1
71	1
72	39
73	1
74	3
75	1
76	20
77	6
78	1
79	1
80	2
81	1
82	1
83	1
84	4
85	2
86	3
87	8
88	20
89	1
90	3
91	4
92	24
93	2
94	1
95	24
96	4
97	1
98	1
99	3
100	7
101	1
102	1
103	1
104	2
105	1

[1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 4, 1, 3, 8, 1, 1, 3, 1, 6, 2, 1, 1, 4, 1, 3, 1, 8, 1, 1, 1, 1, 2, 1, 12, 1, 1, 3, 8, 2, 1, 1, 1, 12, 39, 1, 1, 4, 1, 3, 4, 14, 1, 3, 8, 4, 2, 1, 1, 4, 1, 3, 1, 1, 6, 1, 1, 18, 2, 1, 1, 39, 1, 3, 1, 20, 6, 1, 1, 2, 1, 1, 1, 4, 2, 3, 8, 20, 1, 3, 4, 24, 2, 1, 24, 4, 1, 1, 3, 7, 1, 1, 1, 2, 1]

cp's OEIS Frontend

A348028 Greatest common divisor of A003415 (arithmetic derivative) and sigma, the sum of divisors function.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	3
9	1
10	1
11	1
12	4
13	1
14	3
15	8
16	1
17	1
18	3
19	1
20	6
21	2
22	1
23	1
24	4
25	1
26	3
27	1
28	8
29	1
30	1
31	1
32	1
33	2
34	1
35	12
36	1
37	1
38	3
39	8
40	2
41	1
42	1
43	1
44	12
45	39
46	1
47	1
48	4
49	1
50	3
51	4
52	14
53	1
54	3
55	8
56	4
57	2
58	1
59	1
60	4
61	1
62	3
63	1
64	1
65	6
66	1
67	1
68	18
69	2
70	1
71	1
72	39
73	1
74	3
75	1
76	20
77	6
78	1
79	1
80	2
81	1
82	1
83	1
84	4
85	2
86	3
87	8
88	20
89	1
90	3
91	4
92	24
93	2
94	1
95	24
96	4
97	1
98	1
99	3
100	7
101	1
102	1
103	1
104	2
105	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	3
9	1
10	1
11	1
12	4
13	1
14	3
15	8
16	1
17	1
18	3
19	1
20	6
21	2
22	1
23	1
24	4
25	1
26	3
27	1
28	8
29	1
30	1
31	1
32	1
33	2
34	1
35	12
36	1
37	1
38	3
39	8
40	2
41	1
42	1
43	1
44	12
45	39
46	1
47	1
48	4
49	1
50	3
51	4
52	14
53	1
54	3
55	8
56	4
57	2
58	1
59	1
60	4
61	1
62	3
63	1
64	1
65	6
66	1
67	1
68	18
69	2
70	1
71	1
72	39
73	1
74	3
75	1
76	20
77	6
78	1
79	1
80	2
81	1
82	1
83	1
84	4
85	2
86	3
87	8
88	20
89	1
90	3
91	4
92	24
93	2
94	1
95	24
96	4
97	1
98	1
99	3
100	7
101	1
102	1
103	1
104	2
105	1

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	3
9	1
10	1
11	1
12	4
13	1
14	3
15	8
16	1
17	1
18	3
19	1
20	6
21	2
22	1
23	1
24	4
25	1
26	3
27	1
28	8
29	1
30	1
31	1
32	1
33	2
34	1
35	12
36	1
37	1
38	3
39	8
40	2
41	1
42	1
43	1
44	12
45	39
46	1
47	1
48	4
49	1
50	3
51	4
52	14
53	1
54	3
55	8
56	4
57	2
58	1
59	1
60	4
61	1
62	3
63	1
64	1
65	6
66	1
67	1
68	18
69	2
70	1
71	1
72	39
73	1
74	3
75	1
76	20
77	6
78	1
79	1
80	2
81	1
82	1
83	1
84	4
85	2
86	3
87	8
88	20
89	1
90	3
91	4
92	24
93	2
94	1
95	24
96	4
97	1
98	1
99	3
100	7
101	1
102	1
103	1
104	2
105	1