A066660 - cp's OEIS frontend

A066660 Number of divisors of 2n excluding 1.

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

[1, 2, 3, 3, 3, 5, 3, 4, 5, 5, 3, 7, 3, 5, 7, 5, 3, 8, 3, 7, 7, 5, 3, 9, 5, 5, 7, 7, 3, 11, 3, 6, 7, 5, 7, 11, 3, 5, 7, 9, 3, 11, 3, 7, 11, 5, 3, 11, 5, 8, 7, 7, 3, 11, 7, 9, 7, 5, 3, 15, 3, 5, 11, 7, 7, 11, 3, 7, 7, 11, 3, 14, 3, 5, 11, 7, 7, 11, 3, 11, 9, 5, 3, 15, 7, 5, 7, 9, 3, 17, 7, 7, 7, 5, 7]

cp's OEIS Frontend

A066660 Number of divisors of 2n excluding 1.

Table of values

List of values

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

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

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