A051280 - cp's OEIS frontend

A051280 Numbers n such that n = k/d(k) has exactly 3 solutions, where d(k) = number of divisors of k.

n	a(n)
1	3
2	25
3	40
4	49
5	54
6	121
7	125
8	135
9	140
10	169
11	189
12	216
13	220
14	250
15	260
16	289
17	297
18	340
19	351
20	361
21	375
22	380
23	400
24	459
25	460
26	500
27	513
28	529
29	580
30	620
31	621
32	675
33	729
34	740
35	770
36	783
37	820
38	837
39	841
40	860
41	875
42	882
43	910
44	940
45	961
46	999
47	1060
48	1107
49	1152
50	1161
51	1180
52	1188
53	1190

[3, 25, 40, 49, 54, 121, 125, 135, 140, 169, 189, 216, 220, 250, 260, 289, 297, 340, 351, 361, 375, 380, 400, 459, 460, 500, 513, 529, 580, 620, 621, 675, 729, 740, 770, 783, 820, 837, 841, 860, 875, 882, 910, 940, 961, 999, 1060, 1107, 1152, 1161, 1180, 1188, 1190]

cp's OEIS Frontend

A051280 Numbers n such that n = k/d(k) has exactly 3 solutions, where d(k) = number of divisors of k.

Table of values

List of values