A378913 - cp's OEIS frontend

A378913 a(n) = sum of all positive m such that sigma(m) divides n, where sigma is the sum-of-divisors function (A000203).

n	a(n)
1	1
2	1
3	3
4	4
5	1
6	8
7	5
8	11
9	3
10	1
11	1
12	28
13	10
14	18
15	11
16	11
17	1
18	35
19	1
20	23
21	7
22	1
23	1
24	87
25	1
26	10
27	3
28	33
29	1
30	45
31	42
32	63
33	3
34	1
35	5
36	77
37	1
38	38
39	30
40	57
41	1
42	112
43	1
44	47
45	11
46	1
47	1
48	202
49	5
50	1
51	3
52	13
53	1
54	122
55	1
56	107
57	52
58	1
59	1
60	205
61	1
62	103
63	39
64	63
65	10
66	8
67	1
68	71
69	3
70	18
71	1
72	389
73	1
74	74
75	11

[1, 1, 3, 4, 1, 8, 5, 11, 3, 1, 1, 28, 10, 18, 11, 11, 1, 35, 1, 23, 7, 1, 1, 87, 1, 10, 3, 33, 1, 45, 42, 63, 3, 1, 5, 77, 1, 38, 30, 57, 1, 112, 1, 47, 11, 1, 1, 202, 5, 1, 3, 13, 1, 122, 1, 107, 52, 1, 1, 205, 1, 103, 39, 63, 10, 8, 1, 71, 3, 18, 1, 389, 1, 74, 11]

cp's OEIS Frontend

A378913 a(n) = sum of all positive m such that sigma(m) divides n, where sigma is the sum-of-divisors function (A000203).

Table of values

List of values

n	a(n)
1	1
2	1
3	3
4	4
5	1
6	8
7	5
8	11
9	3
10	1
11	1
12	28
13	10
14	18
15	11
16	11
17	1
18	35
19	1
20	23
21	7
22	1
23	1
24	87
25	1
26	10
27	3
28	33
29	1
30	45
31	42
32	63
33	3
34	1
35	5
36	77
37	1
38	38
39	30
40	57
41	1
42	112
43	1
44	47
45	11
46	1
47	1
48	202
49	5
50	1
51	3
52	13
53	1
54	122
55	1
56	107
57	52
58	1
59	1
60	205
61	1
62	103
63	39
64	63
65	10
66	8
67	1
68	71
69	3
70	18
71	1
72	389
73	1
74	74
75	11

n	a(n)
1	1
2	1
3	3
4	4
5	1
6	8
7	5
8	11
9	3
10	1
11	1
12	28
13	10
14	18
15	11
16	11
17	1
18	35
19	1
20	23
21	7
22	1
23	1
24	87
25	1
26	10
27	3
28	33
29	1
30	45
31	42
32	63
33	3
34	1
35	5
36	77
37	1
38	38
39	30
40	57
41	1
42	112
43	1
44	47
45	11
46	1
47	1
48	202
49	5
50	1
51	3
52	13
53	1
54	122
55	1
56	107
57	52
58	1
59	1
60	205
61	1
62	103
63	39
64	63
65	10
66	8
67	1
68	71
69	3
70	18
71	1
72	389
73	1
74	74
75	11

n	a(n)
1	1
2	1
3	3
4	4
5	1
6	8
7	5
8	11
9	3
10	1
11	1
12	28
13	10
14	18
15	11
16	11
17	1
18	35
19	1
20	23
21	7
22	1
23	1
24	87
25	1
26	10
27	3
28	33
29	1
30	45
31	42
32	63
33	3
34	1
35	5
36	77
37	1
38	38
39	30
40	57
41	1
42	112
43	1
44	47
45	11
46	1
47	1
48	202
49	5
50	1
51	3
52	13
53	1
54	122
55	1
56	107
57	52
58	1
59	1
60	205
61	1
62	103
63	39
64	63
65	10
66	8
67	1
68	71
69	3
70	18
71	1
72	389
73	1
74	74
75	11