A069819 - cp's OEIS frontend

A069819 Numbers k such that 1/(Sum_{p|k} (1/p) - 1), where p are the prime divisors of k, is a positive integer.

n	a(n)
1	30
2	60
3	90
4	120
5	150
6	180
7	240
8	270
9	300
10	360
11	450
12	480
13	540
14	600
15	720
16	750
17	810
18	858
19	900
20	960
21	1080
22	1200
23	1350
24	1440
25	1500
26	1620
27	1716
28	1722
29	1800
30	1920
31	2160
32	2250
33	2400
34	2430
35	2574
36	2700
37	2880
38	3000
39	3240
40	3432
41	3444
42	3600
43	3750
44	3840
45	4050
46	4320
47	4500

[30, 60, 90, 120, 150, 180, 240, 270, 300, 360, 450, 480, 540, 600, 720, 750, 810, 858, 900, 960, 1080, 1200, 1350, 1440, 1500, 1620, 1716, 1722, 1800, 1920, 2160, 2250, 2400, 2430, 2574, 2700, 2880, 3000, 3240, 3432, 3444, 3600, 3750, 3840, 4050, 4320, 4500]

cp's OEIS Frontend

A069819 Numbers k such that 1/(Sum_{p|k} (1/p) - 1), where p are the prime divisors of k, is a positive integer.

Table of values

List of values