A046798 - cp's OEIS frontend

A046798 Number of divisors of 2^n + 1.

n	a(n)
0	2
1	2
2	2
3	3
4	2
5	4
6	4
7	4
8	2
9	8
10	6
11	4
12	4
13	4
14	8
15	12
16	2
17	4
18	16
19	4
20	4
21	12
22	8
23	4
24	8
25	16
26	16
27	20
28	4
29	8
30	48
31	4
32	4
33	24
34	16
35	32
36	16
37	8
38	16
39	12
40	4
41	8
42	64
43	4
44	8
45	64
46	32
47	8
48	8
49	8
50	64
51	48
52	8
53	8
54	64
55	48
56	8
57	24
58	8
59	16
60	16
61	4
62	32
63	64
64	4
65	64
66	64
67	8
68	12
69	24
70	96
71	8
72	32
73	8
74	32
75	96
76	16
77	64
78	768
79	4
80	8
81	192
82	32
83	64

[2, 2, 2, 3, 2, 4, 4, 4, 2, 8, 6, 4, 4, 4, 8, 12, 2, 4, 16, 4, 4, 12, 8, 4, 8, 16, 16, 20, 4, 8, 48, 4, 4, 24, 16, 32, 16, 8, 16, 12, 4, 8, 64, 4, 8, 64, 32, 8, 8, 8, 64, 48, 8, 8, 64, 48, 8, 24, 8, 16, 16, 4, 32, 64, 4, 64, 64, 8, 12, 24, 96, 8, 32, 8, 32, 96, 16, 64, 768, 4, 8, 192, 32, 64]

cp's OEIS Frontend

A046798 Number of divisors of 2^n + 1.

Table of values

List of values

n	a(n)
0	2
1	2
2	2
3	3
4	2
5	4
6	4
7	4
8	2
9	8
10	6
11	4
12	4
13	4
14	8
15	12
16	2
17	4
18	16
19	4
20	4
21	12
22	8
23	4
24	8
25	16
26	16
27	20
28	4
29	8
30	48
31	4
32	4
33	24
34	16
35	32
36	16
37	8
38	16
39	12
40	4
41	8
42	64
43	4
44	8
45	64
46	32
47	8
48	8
49	8
50	64
51	48
52	8
53	8
54	64
55	48
56	8
57	24
58	8
59	16
60	16
61	4
62	32
63	64
64	4
65	64
66	64
67	8
68	12
69	24
70	96
71	8
72	32
73	8
74	32
75	96
76	16
77	64
78	768
79	4
80	8
81	192
82	32
83	64

n	a(n)
0	2
1	2
2	2
3	3
4	2
5	4
6	4
7	4
8	2
9	8
10	6
11	4
12	4
13	4
14	8
15	12
16	2
17	4
18	16
19	4
20	4
21	12
22	8
23	4
24	8
25	16
26	16
27	20
28	4
29	8
30	48
31	4
32	4
33	24
34	16
35	32
36	16
37	8
38	16
39	12
40	4
41	8
42	64
43	4
44	8
45	64
46	32
47	8
48	8
49	8
50	64
51	48
52	8
53	8
54	64
55	48
56	8
57	24
58	8
59	16
60	16
61	4
62	32
63	64
64	4
65	64
66	64
67	8
68	12
69	24
70	96
71	8
72	32
73	8
74	32
75	96
76	16
77	64
78	768
79	4
80	8
81	192
82	32
83	64

n	a(n)
0	2
1	2
2	2
3	3
4	2
5	4
6	4
7	4
8	2
9	8
10	6
11	4
12	4
13	4
14	8
15	12
16	2
17	4
18	16
19	4
20	4
21	12
22	8
23	4
24	8
25	16
26	16
27	20
28	4
29	8
30	48
31	4
32	4
33	24
34	16
35	32
36	16
37	8
38	16
39	12
40	4
41	8
42	64
43	4
44	8
45	64
46	32
47	8
48	8
49	8
50	64
51	48
52	8
53	8
54	64
55	48
56	8
57	24
58	8
59	16
60	16
61	4
62	32
63	64
64	4
65	64
66	64
67	8
68	12
69	24
70	96
71	8
72	32
73	8
74	32
75	96
76	16
77	64
78	768
79	4
80	8
81	192
82	32
83	64