A062821 - cp's OEIS frontend

A062821 Number of divisors of totient of n.

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

[1, 1, 2, 2, 3, 2, 4, 3, 4, 3, 4, 3, 6, 4, 4, 4, 5, 4, 6, 4, 6, 4, 4, 4, 6, 6, 6, 6, 6, 4, 8, 5, 6, 5, 8, 6, 9, 6, 8, 5, 8, 6, 8, 6, 8, 4, 4, 5, 8, 6, 6, 8, 6, 6, 8, 8, 9, 6, 4, 5, 12, 8, 9, 6, 10, 6, 8, 6, 6, 8, 8, 8, 12, 9, 8, 9, 12, 8, 8, 6, 8, 8, 4, 8, 7, 8, 8, 8, 8, 8, 12, 6, 12, 4, 12, 6, 12, 8, 12, 8]

cp's OEIS Frontend

A062821 Number of divisors of totient of n.

Table of values

List of values

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

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

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