A337228 - cp's OEIS frontend

A337228 Number of ordered pairs of divisors of n, (d1,d2), such that d2 is prime and d1 <= d2.

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

[0, 2, 2, 2, 2, 5, 2, 2, 2, 5, 2, 5, 2, 5, 5, 2, 2, 5, 2, 6, 5, 5, 2, 5, 2, 5, 2, 6, 2, 9, 2, 2, 5, 5, 5, 5, 2, 5, 5, 6, 2, 10, 2, 6, 5, 5, 2, 5, 2, 5, 5, 6, 2, 5, 5, 6, 5, 5, 2, 10, 2, 5, 5, 2, 5, 10, 2, 6, 5, 9, 2, 5, 2, 5, 5, 6, 5, 10, 2, 6, 2, 5, 2, 11, 5, 5, 5, 7, 2, 9, 5, 6, 5, 5]

cp's OEIS Frontend

A337228 Number of ordered pairs of divisors of n, (d1,d2), such that d2 is prime and d1 <= d2.

Table of values

List of values

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

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

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