A073810 - cp's OEIS frontend

A073810 Number of common divisors of sigma(2,n) and sigma(3,n).

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

[1, 1, 2, 1, 2, 2, 2, 2, 1, 2, 2, 4, 2, 2, 3, 2, 2, 1, 2, 8, 3, 2, 2, 4, 1, 2, 6, 2, 2, 3, 2, 2, 3, 2, 3, 1, 2, 4, 3, 8, 2, 3, 2, 4, 4, 2, 2, 4, 2, 2, 3, 4, 2, 6, 3, 4, 6, 4, 2, 12, 2, 2, 2, 2, 3, 3, 2, 8, 3, 3, 2, 4, 2, 2, 4, 4, 3, 3, 2, 4, 3, 2, 2, 6, 6, 2, 6, 4, 2, 4, 3, 4, 3, 2, 3, 8, 2, 2, 2, 1, 2, 3, 2, 4]

cp's OEIS Frontend

A073810 Number of common divisors of sigma(2,n) and sigma(3,n).

Table of values

List of values

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

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

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