A070633 - cp's OEIS frontend

A070633 a(n) is the number of k>0 such that phi(k) divides n.

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

[2, 5, 2, 9, 2, 9, 2, 14, 2, 7, 2, 19, 2, 5, 2, 20, 2, 13, 2, 16, 2, 7, 2, 34, 2, 5, 2, 11, 2, 13, 2, 27, 2, 5, 2, 31, 2, 5, 2, 30, 2, 13, 2, 14, 2, 7, 2, 51, 2, 7, 2, 11, 2, 15, 2, 19, 2, 7, 2, 37, 2, 5, 2, 35, 2, 13, 2, 9, 2, 9, 2, 63, 2, 5, 2, 9, 2, 11, 2, 46, 2, 7, 2, 31, 2, 5, 2, 25, 2, 17, 2]

cp's OEIS Frontend

A070633 a(n) is the number of k>0 such that phi(k) divides n.

Table of values

List of values

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

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

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