A305436 - cp's OEIS frontend

A305436 Number of divisors of n of the form 2^k + 1 for k >= 0.

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	0
8	1
9	2
10	2
11	0
12	2
13	0
14	1
15	2
16	1
17	1
18	3
19	0
20	2
21	1
22	1
23	0
24	2
25	1
26	1
27	2
28	1
29	0
30	3
31	0
32	1
33	2
34	2
35	1
36	3
37	0
38	1
39	1
40	2
41	0
42	2
43	0
44	1
45	3
46	1
47	0
48	2
49	0
50	2
51	2
52	1
53	0
54	3
55	1
56	1
57	1
58	1
59	0
60	3
61	0
62	1
63	2
64	1
65	2
66	3
67	0
68	2
69	1
70	2
71	0
72	3
73	0
74	1
75	2
76	1
77	0
78	2
79	0
80	2
81	2
82	1
83	0
84	2
85	2
86	1
87	1
88	1
89	0
90	4
91	0
92	1
93	1
94	1
95	1
96	2
97	0
98	1
99	3
100	2
101	0
102	3
103	0
104	1
105	2

[0, 1, 1, 1, 1, 2, 0, 1, 2, 2, 0, 2, 0, 1, 2, 1, 1, 3, 0, 2, 1, 1, 0, 2, 1, 1, 2, 1, 0, 3, 0, 1, 2, 2, 1, 3, 0, 1, 1, 2, 0, 2, 0, 1, 3, 1, 0, 2, 0, 2, 2, 1, 0, 3, 1, 1, 1, 1, 0, 3, 0, 1, 2, 1, 2, 3, 0, 2, 1, 2, 0, 3, 0, 1, 2, 1, 0, 2, 0, 2, 2, 1, 0, 2, 2, 1, 1, 1, 0, 4, 0, 1, 1, 1, 1, 2, 0, 1, 3, 2, 0, 3, 0, 1, 2]

cp's OEIS Frontend

A305436 Number of divisors of n of the form 2^k + 1 for k >= 0.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	0
8	1
9	2
10	2
11	0
12	2
13	0
14	1
15	2
16	1
17	1
18	3
19	0
20	2
21	1
22	1
23	0
24	2
25	1
26	1
27	2
28	1
29	0
30	3
31	0
32	1
33	2
34	2
35	1
36	3
37	0
38	1
39	1
40	2
41	0
42	2
43	0
44	1
45	3
46	1
47	0
48	2
49	0
50	2
51	2
52	1
53	0
54	3
55	1
56	1
57	1
58	1
59	0
60	3
61	0
62	1
63	2
64	1
65	2
66	3
67	0
68	2
69	1
70	2
71	0
72	3
73	0
74	1
75	2
76	1
77	0
78	2
79	0
80	2
81	2
82	1
83	0
84	2
85	2
86	1
87	1
88	1
89	0
90	4
91	0
92	1
93	1
94	1
95	1
96	2
97	0
98	1
99	3
100	2
101	0
102	3
103	0
104	1
105	2

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	0
8	1
9	2
10	2
11	0
12	2
13	0
14	1
15	2
16	1
17	1
18	3
19	0
20	2
21	1
22	1
23	0
24	2
25	1
26	1
27	2
28	1
29	0
30	3
31	0
32	1
33	2
34	2
35	1
36	3
37	0
38	1
39	1
40	2
41	0
42	2
43	0
44	1
45	3
46	1
47	0
48	2
49	0
50	2
51	2
52	1
53	0
54	3
55	1
56	1
57	1
58	1
59	0
60	3
61	0
62	1
63	2
64	1
65	2
66	3
67	0
68	2
69	1
70	2
71	0
72	3
73	0
74	1
75	2
76	1
77	0
78	2
79	0
80	2
81	2
82	1
83	0
84	2
85	2
86	1
87	1
88	1
89	0
90	4
91	0
92	1
93	1
94	1
95	1
96	2
97	0
98	1
99	3
100	2
101	0
102	3
103	0
104	1
105	2

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	0
8	1
9	2
10	2
11	0
12	2
13	0
14	1
15	2
16	1
17	1
18	3
19	0
20	2
21	1
22	1
23	0
24	2
25	1
26	1
27	2
28	1
29	0
30	3
31	0
32	1
33	2
34	2
35	1
36	3
37	0
38	1
39	1
40	2
41	0
42	2
43	0
44	1
45	3
46	1
47	0
48	2
49	0
50	2
51	2
52	1
53	0
54	3
55	1
56	1
57	1
58	1
59	0
60	3
61	0
62	1
63	2
64	1
65	2
66	3
67	0
68	2
69	1
70	2
71	0
72	3
73	0
74	1
75	2
76	1
77	0
78	2
79	0
80	2
81	2
82	1
83	0
84	2
85	2
86	1
87	1
88	1
89	0
90	4
91	0
92	1
93	1
94	1
95	1
96	2
97	0
98	1
99	3
100	2
101	0
102	3
103	0
104	1
105	2