A335709 - cp's OEIS frontend

A335709 a(n) is the smallest Niven number that has exactly n divisors or -1 if no such number exists.

n	a(n)
1	1
2	2
3	4
4	6
5	81
6	12
7	-1
8	24
9	36
10	48
11	59049
12	60
13	-1
14	192
15	144
16	120
17	43046721
18	180
19	43472473122830653562489222659449707872441
20	240
21	576
22	3072
23	191540580003116921429323712183642218614831262597249
24	360
25	1296
26	94208
27	900
28	960
29	-1
30	720
31	-1
32	840
33	9216
34	720896
35	5184
36	1260

[1, 2, 4, 6, 81, 12, -1, 24, 36, 48, 59049, 60, -1, 192, 144, 120, 43046721, 180, 43472473122830653562489222659449707872441, 240, 576, 3072, 191540580003116921429323712183642218614831262597249, 360, 1296, 94208, 900, 960, -1, 720, -1, 840, 9216, 720896, 5184, 1260]

cp's OEIS Frontend

A335709 a(n) is the smallest Niven number that has exactly n divisors or -1 if no such number exists.

Table of values

List of values