A321297 - cp's OEIS frontend

A321297 a(n) is the sum of proper divisors of n that are >= sqrt(n) minus the sum of the divisors that are greater than 1 and less than sqrt(n).

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

[0, 0, 0, 2, 0, 1, 0, 2, 3, 3, 0, 5, 0, 5, 2, 10, 0, 10, 0, 9, 4, 9, 0, 17, 5, 11, 6, 15, 0, 21, 0, 18, 8, 15, 2, 36, 0, 17, 10, 27, 0, 31, 0, 27, 16, 21, 0, 45, 7, 28, 14, 33, 0, 43, 6, 37, 16, 27, 0, 67, 0, 29, 20, 50, 8, 55, 0, 45, 20, 45, 0, 76, 0, 35, 32]

cp's OEIS Frontend

A321297 a(n) is the sum of proper divisors of n that are >= sqrt(n) minus the sum of the divisors that are greater than 1 and less than sqrt(n).

Table of values

List of values

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

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

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