A295313 - cp's OEIS frontend

A295313 a(n) = gcd(sigma(n), phi(sigma(n))).

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

[1, 1, 2, 1, 2, 4, 4, 1, 1, 6, 4, 4, 2, 8, 8, 1, 6, 3, 4, 6, 16, 12, 8, 4, 1, 6, 8, 8, 2, 24, 16, 9, 16, 18, 16, 1, 2, 4, 8, 6, 6, 32, 4, 12, 6, 24, 16, 4, 3, 3, 24, 14, 18, 8, 24, 8, 16, 6, 4, 24, 2, 32, 8, 1, 12, 48, 4, 18, 32, 48, 24, 3, 2, 6, 4, 4, 32, 24, 16, 6, 11, 18, 12, 32, 36, 4, 8, 12, 6, 18, 16, 24, 64, 48, 8]

cp's OEIS Frontend

A295313 a(n) = gcd(sigma(n), phi(sigma(n))).

Table of values

List of values

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

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

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