A248008 - cp's OEIS frontend

A248008 Least positive integer m such that m + n divides sigma(m*n), where sigma(k) denotes the sum of all positive divisors of k.

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

[2, 1, 1, 3, 1, 4, 1, 7, 4, 14, 1, 18, 1, 10, 9, 15, 1, 12, 1, 1, 11, 5, 1, 4, 6, 4, 6, 2, 1, 18, 1, 28, 6, 14, 13, 13, 1, 12, 17, 22, 1, 22, 1, 10, 3, 10, 1, 30, 8, 12, 9, 18, 1, 2, 17, 6, 7, 26, 1, 52, 1, 22, 28, 38, 19, 12, 1, 22, 36, 26]

cp's OEIS Frontend

A248008 Least positive integer m such that m + n divides sigma(m*n), where sigma(k) denotes the sum of all positive divisors of k.

Table of values

List of values

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

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

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