A008328 - cp's OEIS frontend

A008328 Number of divisors of prime(n)-1.

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

[1, 2, 3, 4, 4, 6, 5, 6, 4, 6, 8, 9, 8, 8, 4, 6, 4, 12, 8, 8, 12, 8, 4, 8, 12, 9, 8, 4, 12, 10, 12, 8, 8, 8, 6, 12, 12, 10, 4, 6, 4, 18, 8, 14, 9, 12, 16, 8, 4, 12, 8, 8, 20, 8, 9, 4, 6, 16, 12, 16, 8, 6, 12, 8, 16, 6, 16, 20, 4, 12, 12, 4, 8, 12, 16, 4, 6, 18, 15, 16, 8, 24, 8]

cp's OEIS Frontend

A008328 Number of divisors of prime(n)-1.

Table of values

List of values

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

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

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