A327657 - cp's OEIS frontend

A327657 Number of divisors of n that are 1 or whose prime indices have a common divisor > 1.

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

[1, 1, 2, 1, 2, 2, 2, 1, 3, 2, 2, 2, 2, 2, 3, 1, 2, 3, 2, 2, 4, 2, 2, 2, 3, 2, 4, 2, 2, 3, 2, 1, 3, 2, 3, 3, 2, 2, 4, 2, 2, 4, 2, 2, 4, 2, 2, 2, 3, 3, 3, 2, 2, 4, 3, 2, 4, 2, 2, 3, 2, 2, 6, 1, 4, 3, 2, 2, 3, 3, 2, 3, 2, 2, 4, 2, 3, 4, 2, 2, 5, 2, 2, 4, 3, 2, 4, 2, 2, 4, 4, 2, 3, 2, 3, 2, 2, 3, 4, 3, 2, 3, 2, 2, 5]

cp's OEIS Frontend

A327657 Number of divisors of n that are 1 or whose prime indices have a common divisor > 1.

Table of values

List of values

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

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

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