A034444 - cp's OEIS frontend

A034444 a(n) is the number of unitary divisors of n (d such that d divides n, gcd(d, n/d) = 1).

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

[1, 2, 2, 2, 2, 4, 2, 2, 2, 4, 2, 4, 2, 4, 4, 2, 2, 4, 2, 4, 4, 4, 2, 4, 2, 4, 2, 4, 2, 8, 2, 2, 4, 4, 4, 4, 2, 4, 4, 4, 2, 8, 2, 4, 4, 4, 2, 4, 2, 4, 4, 4, 2, 4, 4, 4, 4, 4, 2, 8, 2, 4, 4, 2, 4, 8, 2, 4, 4, 8, 2, 4, 2, 4, 4, 4, 4, 8, 2, 4, 2, 4, 2, 8, 4, 4, 4, 4, 2, 8, 4, 4, 4, 4, 4, 4, 2, 4, 4, 4, 2, 8, 2, 4, 8]

cp's OEIS Frontend

A034444 a(n) is the number of unitary divisors of n (d such that d divides n, gcd(d, n/d) = 1).

Table of values

List of values

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

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

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