A082063 - cp's OEIS frontend

A082063 Greatest common prime divisor of n and sigma_2(n) = A001157(n), or 1 if the two are relatively prime.

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

[1, 1, 1, 1, 1, 2, 1, 1, 1, 5, 1, 3, 1, 2, 5, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 7, 1, 5, 1, 1, 1, 2, 5, 3, 1, 2, 1, 5, 1, 2, 1, 2, 1, 2, 1, 2, 1, 5, 1, 2, 1, 2, 1, 2, 1, 2, 1, 5, 1, 2, 7, 1, 13, 2, 1, 2, 1, 5, 1, 1, 1, 2, 5, 2, 1, 2, 1, 2, 1, 2, 1, 7, 5, 2, 1, 2, 1, 5, 1, 2, 1, 2, 1, 3, 1, 1, 1, 1, 1, 2, 1, 2, 5]

cp's OEIS Frontend

A082063 Greatest common prime divisor of n and sigma_2(n) = A001157(n), or 1 if the two are relatively prime.

Table of values

List of values

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

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

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