A017665 - cp's OEIS frontend

A017665 Numerator of sum of reciprocals of divisors of n.

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	2
7	8
8	15
9	13
10	9
11	12
12	7
13	14
14	12
15	8
16	31
17	18
18	13
19	20
20	21
21	32
22	18
23	24
24	5
25	31
26	21
27	40
28	2
29	30
30	12
31	32
32	63
33	16
34	27
35	48
36	91
37	38
38	30
39	56
40	9
41	42
42	16
43	44
44	21
45	26
46	36
47	48
48	31
49	57
50	93
51	24
52	49
53	54
54	20
55	72
56	15
57	80
58	45
59	60
60	14
61	62
62	48
63	104
64	127
65	84
66	24
67	68
68	63
69	32
70	72
71	72
72	65
73	74
74	57

[1, 3, 4, 7, 6, 2, 8, 15, 13, 9, 12, 7, 14, 12, 8, 31, 18, 13, 20, 21, 32, 18, 24, 5, 31, 21, 40, 2, 30, 12, 32, 63, 16, 27, 48, 91, 38, 30, 56, 9, 42, 16, 44, 21, 26, 36, 48, 31, 57, 93, 24, 49, 54, 20, 72, 15, 80, 45, 60, 14, 62, 48, 104, 127, 84, 24, 68, 63, 32, 72, 72, 65, 74, 57]

cp's OEIS Frontend

A017665 Numerator of sum of reciprocals of divisors of n.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	2
7	8
8	15
9	13
10	9
11	12
12	7
13	14
14	12
15	8
16	31
17	18
18	13
19	20
20	21
21	32
22	18
23	24
24	5
25	31
26	21
27	40
28	2
29	30
30	12
31	32
32	63
33	16
34	27
35	48
36	91
37	38
38	30
39	56
40	9
41	42
42	16
43	44
44	21
45	26
46	36
47	48
48	31
49	57
50	93
51	24
52	49
53	54
54	20
55	72
56	15
57	80
58	45
59	60
60	14
61	62
62	48
63	104
64	127
65	84
66	24
67	68
68	63
69	32
70	72
71	72
72	65
73	74
74	57

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	2
7	8
8	15
9	13
10	9
11	12
12	7
13	14
14	12
15	8
16	31
17	18
18	13
19	20
20	21
21	32
22	18
23	24
24	5
25	31
26	21
27	40
28	2
29	30
30	12
31	32
32	63
33	16
34	27
35	48
36	91
37	38
38	30
39	56
40	9
41	42
42	16
43	44
44	21
45	26
46	36
47	48
48	31
49	57
50	93
51	24
52	49
53	54
54	20
55	72
56	15
57	80
58	45
59	60
60	14
61	62
62	48
63	104
64	127
65	84
66	24
67	68
68	63
69	32
70	72
71	72
72	65
73	74
74	57

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	2
7	8
8	15
9	13
10	9
11	12
12	7
13	14
14	12
15	8
16	31
17	18
18	13
19	20
20	21
21	32
22	18
23	24
24	5
25	31
26	21
27	40
28	2
29	30
30	12
31	32
32	63
33	16
34	27
35	48
36	91
37	38
38	30
39	56
40	9
41	42
42	16
43	44
44	21
45	26
46	36
47	48
48	31
49	57
50	93
51	24
52	49
53	54
54	20
55	72
56	15
57	80
58	45
59	60
60	14
61	62
62	48
63	104
64	127
65	84
66	24
67	68
68	63
69	32
70	72
71	72
72	65
73	74
74	57