A239161 - cp's OEIS frontend

A239161 Numbers k such that the ratio (sum of divisors of k) /(sum of divisors d of k with d <= sqrt(k)) is an integer.

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

[1, 2, 3, 5, 6, 7, 8, 10, 11, 13, 14, 15, 17, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 31, 32, 33, 34, 35, 37, 38, 39, 41, 42, 43, 44, 46, 47, 51, 52, 53, 54, 55, 57, 58, 59, 60, 61, 62, 65, 66, 67, 68, 69, 71, 73, 74, 76, 77, 78, 79, 82, 83, 85, 86, 87, 88, 89]

cp's OEIS Frontend

A239161 Numbers k such that the ratio (sum of divisors of k) /(sum of divisors d of k with d <= sqrt(k)) is an integer.

Table of values

List of values

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

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

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