A318996 - cp's OEIS frontend

A318996 a(n) = Sum_{d|n} (sigma(n) mod d).

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	0
7	1
8	11
9	5
10	11
11	1
12	9
13	1
14	13
15	13
16	26
17	1
18	10
19	1
20	8
21	17
22	17
23	1
24	16
25	7
26	19
27	18
28	0
29	1
30	28
31	1
32	57
33	19
34	23
35	22
36	34
37	1
38	25
39	23
40	24
41	1
42	41
43	1
44	65
45	45
46	29
47	1
48	57
49	9
50	68
51	25
52	75
53	1
54	39
55	25
56	25
57	29
58	35
59	1
60	88
61	1
62	37
63	74
64	120
65	29
66	37
67	1
68	91
69	31
70	24
71	1
72	103

[0, 1, 1, 4, 1, 0, 1, 11, 5, 11, 1, 9, 1, 13, 13, 26, 1, 10, 1, 8, 17, 17, 1, 16, 7, 19, 18, 0, 1, 28, 1, 57, 19, 23, 22, 34, 1, 25, 23, 24, 1, 41, 1, 65, 45, 29, 1, 57, 9, 68, 25, 75, 1, 39, 25, 25, 29, 35, 1, 88, 1, 37, 74, 120, 29, 37, 1, 91, 31, 24, 1, 103]

cp's OEIS Frontend

A318996 a(n) = Sum_{d|n} (sigma(n) mod d).

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	0
7	1
8	11
9	5
10	11
11	1
12	9
13	1
14	13
15	13
16	26
17	1
18	10
19	1
20	8
21	17
22	17
23	1
24	16
25	7
26	19
27	18
28	0
29	1
30	28
31	1
32	57
33	19
34	23
35	22
36	34
37	1
38	25
39	23
40	24
41	1
42	41
43	1
44	65
45	45
46	29
47	1
48	57
49	9
50	68
51	25
52	75
53	1
54	39
55	25
56	25
57	29
58	35
59	1
60	88
61	1
62	37
63	74
64	120
65	29
66	37
67	1
68	91
69	31
70	24
71	1
72	103

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	0
7	1
8	11
9	5
10	11
11	1
12	9
13	1
14	13
15	13
16	26
17	1
18	10
19	1
20	8
21	17
22	17
23	1
24	16
25	7
26	19
27	18
28	0
29	1
30	28
31	1
32	57
33	19
34	23
35	22
36	34
37	1
38	25
39	23
40	24
41	1
42	41
43	1
44	65
45	45
46	29
47	1
48	57
49	9
50	68
51	25
52	75
53	1
54	39
55	25
56	25
57	29
58	35
59	1
60	88
61	1
62	37
63	74
64	120
65	29
66	37
67	1
68	91
69	31
70	24
71	1
72	103

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	0
7	1
8	11
9	5
10	11
11	1
12	9
13	1
14	13
15	13
16	26
17	1
18	10
19	1
20	8
21	17
22	17
23	1
24	16
25	7
26	19
27	18
28	0
29	1
30	28
31	1
32	57
33	19
34	23
35	22
36	34
37	1
38	25
39	23
40	24
41	1
42	41
43	1
44	65
45	45
46	29
47	1
48	57
49	9
50	68
51	25
52	75
53	1
54	39
55	25
56	25
57	29
58	35
59	1
60	88
61	1
62	37
63	74
64	120
65	29
66	37
67	1
68	91
69	31
70	24
71	1
72	103