A091895 - cp's OEIS frontend

A091895 Least number k such that the denominator of d(k)/k = n, or zero if no such number exists, where d is the number-of-divisors function A000005.

n	a(n)
1	1
2	8
3	3
4	4
5	5
6	72
7	7
8	80
9	108
10	20
11	11
12	240
13	13
14	28
15	15
16	16
17	17
18	0
19	19
20	480
21	21
22	44
23	23
24	48
25	25
26	52
27	27
28	560
29	29
30	0
31	31
32	448
33	33
34	68
35	35
36	864
37	37
38	76
39	39
40	160
41	41
42	1680
43	43
44	880
45	540
46	92
47	47
48	144
49	49
50	200
51	51
52	1040
53	53
54	972
55	55
56	112
57	57
58	116
59	59
60	1920
61	61
62	124
63	756
64	64
65	65

[1, 8, 3, 4, 5, 72, 7, 80, 108, 20, 11, 240, 13, 28, 15, 16, 17, 0, 19, 480, 21, 44, 23, 48, 25, 52, 27, 560, 29, 0, 31, 448, 33, 68, 35, 864, 37, 76, 39, 160, 41, 1680, 43, 880, 540, 92, 47, 144, 49, 200, 51, 1040, 53, 972, 55, 112, 57, 116, 59, 1920, 61, 124, 756, 64, 65]

cp's OEIS Frontend

A091895 Least number k such that the denominator of d(k)/k = n, or zero if no such number exists, where d is the number-of-divisors function A000005.

Table of values

List of values