A036763 - cp's OEIS frontend

A036763 Numbers k such that k*d(x) = x has no solution for x, where d (A000005) is the number of divisors; sequence gives impossible x/d(x) quotients in order of magnitude.

n	a(n)
1	18
2	27
3	30
4	45
5	63
6	64
7	72
8	99
9	105
10	112
11	117
12	144
13	153
14	160
15	162
16	165
17	171
18	195
19	207
20	225
21	243
22	252
23	255
24	261
25	279
26	285
27	288
28	294
29	320
30	333
31	336
32	345
33	352
34	360
35	369
36	387
37	396
38	405
39	416
40	423
41	435
42	441
43	465
44	468
45	477
46	490
47	504
48	531
49	544
50	549
51	555
52	567
53	576

[18, 27, 30, 45, 63, 64, 72, 99, 105, 112, 117, 144, 153, 160, 162, 165, 171, 195, 207, 225, 243, 252, 255, 261, 279, 285, 288, 294, 320, 333, 336, 345, 352, 360, 369, 387, 396, 405, 416, 423, 435, 441, 465, 468, 477, 490, 504, 531, 544, 549, 555, 567, 576]

cp's OEIS Frontend

A036763 Numbers k such that k*d(x) = x has no solution for x, where d (A000005) is the number of divisors; sequence gives impossible x/d(x) quotients in order of magnitude.

Table of values

List of values

n	a(n)
1	18
2	27
3	30
4	45
5	63
6	64
7	72
8	99
9	105
10	112
11	117
12	144
13	153
14	160
15	162
16	165
17	171
18	195
19	207
20	225
21	243
22	252
23	255
24	261
25	279
26	285
27	288
28	294
29	320
30	333
31	336
32	345
33	352
34	360
35	369
36	387
37	396
38	405
39	416
40	423
41	435
42	441
43	465
44	468
45	477
46	490
47	504
48	531
49	544
50	549
51	555
52	567
53	576

n	a(n)
1	18
2	27
3	30
4	45
5	63
6	64
7	72
8	99
9	105
10	112
11	117
12	144
13	153
14	160
15	162
16	165
17	171
18	195
19	207
20	225
21	243
22	252
23	255
24	261
25	279
26	285
27	288
28	294
29	320
30	333
31	336
32	345
33	352
34	360
35	369
36	387
37	396
38	405
39	416
40	423
41	435
42	441
43	465
44	468
45	477
46	490
47	504
48	531
49	544
50	549
51	555
52	567
53	576

n	a(n)
1	18
2	27
3	30
4	45
5	63
6	64
7	72
8	99
9	105
10	112
11	117
12	144
13	153
14	160
15	162
16	165
17	171
18	195
19	207
20	225
21	243
22	252
23	255
24	261
25	279
26	285
27	288
28	294
29	320
30	333
31	336
32	345
33	352
34	360
35	369
36	387
37	396
38	405
39	416
40	423
41	435
42	441
43	465
44	468
45	477
46	490
47	504
48	531
49	544
50	549
51	555
52	567
53	576