A337175 - cp's OEIS frontend

A337175 Number of pairs of divisors of n, (d1,d2), such that d1 <= d2 and d1*d2 < n.

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

[0, 1, 1, 2, 1, 4, 1, 4, 2, 4, 1, 9, 1, 4, 4, 6, 1, 9, 1, 9, 4, 4, 1, 16, 2, 4, 4, 9, 1, 16, 1, 9, 4, 4, 4, 20, 1, 4, 4, 16, 1, 16, 1, 9, 9, 4, 1, 25, 2, 9, 4, 9, 1, 16, 4, 16, 4, 4, 1, 36, 1, 4, 9, 12, 4, 16, 1, 9, 4, 16, 1, 36, 1, 4, 9, 9, 4, 16, 1, 25, 6, 4, 1, 36, 4, 4]

cp's OEIS Frontend

A337175 Number of pairs of divisors of n, (d1,d2), such that d1 <= d2 and d1*d2 < n.

Table of values

List of values

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

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

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