A017666 - cp's OEIS frontend

A017666 Denominator of sum of reciprocals of divisors of n.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	1
7	7
8	8
9	9
10	5
11	11
12	3
13	13
14	7
15	5
16	16
17	17
18	6
19	19
20	10
21	21
22	11
23	23
24	2
25	25
26	13
27	27
28	1
29	29
30	5
31	31
32	32
33	11
34	17
35	35
36	36
37	37
38	19
39	39
40	4
41	41
42	7
43	43
44	11
45	15
46	23
47	47
48	12
49	49
50	50
51	17
52	26
53	53
54	9
55	55
56	7
57	57
58	29
59	59
60	5
61	61
62	31
63	63
64	64
65	65
66	11
67	67
68	34
69	23
70	35
71	71
72	24
73	73
74	37
75	75
76	19

[1, 2, 3, 4, 5, 1, 7, 8, 9, 5, 11, 3, 13, 7, 5, 16, 17, 6, 19, 10, 21, 11, 23, 2, 25, 13, 27, 1, 29, 5, 31, 32, 11, 17, 35, 36, 37, 19, 39, 4, 41, 7, 43, 11, 15, 23, 47, 12, 49, 50, 17, 26, 53, 9, 55, 7, 57, 29, 59, 5, 61, 31, 63, 64, 65, 11, 67, 34, 23, 35, 71, 24, 73, 37, 75, 19]

cp's OEIS Frontend

A017666 Denominator of sum of reciprocals of divisors of n.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	1
7	7
8	8
9	9
10	5
11	11
12	3
13	13
14	7
15	5
16	16
17	17
18	6
19	19
20	10
21	21
22	11
23	23
24	2
25	25
26	13
27	27
28	1
29	29
30	5
31	31
32	32
33	11
34	17
35	35
36	36
37	37
38	19
39	39
40	4
41	41
42	7
43	43
44	11
45	15
46	23
47	47
48	12
49	49
50	50
51	17
52	26
53	53
54	9
55	55
56	7
57	57
58	29
59	59
60	5
61	61
62	31
63	63
64	64
65	65
66	11
67	67
68	34
69	23
70	35
71	71
72	24
73	73
74	37
75	75
76	19

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	1
7	7
8	8
9	9
10	5
11	11
12	3
13	13
14	7
15	5
16	16
17	17
18	6
19	19
20	10
21	21
22	11
23	23
24	2
25	25
26	13
27	27
28	1
29	29
30	5
31	31
32	32
33	11
34	17
35	35
36	36
37	37
38	19
39	39
40	4
41	41
42	7
43	43
44	11
45	15
46	23
47	47
48	12
49	49
50	50
51	17
52	26
53	53
54	9
55	55
56	7
57	57
58	29
59	59
60	5
61	61
62	31
63	63
64	64
65	65
66	11
67	67
68	34
69	23
70	35
71	71
72	24
73	73
74	37
75	75
76	19

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	1
7	7
8	8
9	9
10	5
11	11
12	3
13	13
14	7
15	5
16	16
17	17
18	6
19	19
20	10
21	21
22	11
23	23
24	2
25	25
26	13
27	27
28	1
29	29
30	5
31	31
32	32
33	11
34	17
35	35
36	36
37	37
38	19
39	39
40	4
41	41
42	7
43	43
44	11
45	15
46	23
47	47
48	12
49	49
50	50
51	17
52	26
53	53
54	9
55	55
56	7
57	57
58	29
59	59
60	5
61	61
62	31
63	63
64	64
65	65
66	11
67	67
68	34
69	23
70	35
71	71
72	24
73	73
74	37
75	75
76	19