A133996 - cp's OEIS frontend

A133996 a(n) = the smallest positive integer with exactly n positive "non-isolated divisors". A divisor, k, of n is non-isolated if (k-1) or (k+1) also divides n.

n	a(n)
2	2
3	6
4	12
5	30
6	60
7	90
8	180
9	360
10	630
11	420
12	840
13	1680
14	4200
15	1260
16	2520
17	3780
18	7560
19	15120
20	13860
21	36960
22	49140
23	27720
24	32760
25	65520
26	83160
27	98280
28	196560
29	314160
30	277200
31	491400
32	526680
33	471240
34	360360
35	1164240
36	942480
37	720720
38	1081080

[2, 6, 12, 30, 60, 90, 180, 360, 630, 420, 840, 1680, 4200, 1260, 2520, 3780, 7560, 15120, 13860, 36960, 49140, 27720, 32760, 65520, 83160, 98280, 196560, 314160, 277200, 491400, 526680, 471240, 360360, 1164240, 942480, 720720, 1081080]

cp's OEIS Frontend

A133996 a(n) = the smallest positive integer with exactly n positive "non-isolated divisors". A divisor, k, of n is non-isolated if (k-1) or (k+1) also divides n.

Table of values

List of values