A071090 - cp's OEIS frontend

A071090 Sum of middle divisors of n.

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

[1, 1, 0, 2, 0, 5, 0, 2, 3, 0, 0, 7, 0, 0, 8, 4, 0, 3, 0, 9, 0, 0, 0, 10, 5, 0, 0, 11, 0, 11, 0, 4, 0, 0, 12, 6, 0, 0, 0, 13, 0, 13, 0, 0, 14, 0, 0, 14, 7, 5, 0, 0, 0, 15, 0, 15, 0, 0, 0, 16, 0, 0, 16, 8, 0, 17, 0, 0, 0, 17, 0, 23, 0, 0, 0, 0, 18, 0, 0, 18, 9, 0, 0, 19, 0, 0, 0, 19, 0, 19, 20, 0, 0]

cp's OEIS Frontend

A071090 Sum of middle divisors of n.

Table of values

List of values

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

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

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