A226365 - cp's OEIS frontend

A226365 Composite numbers such that Sum_{i=1..k} (1 + 1/p_i) - Product_{i=1..k} (1 + 1/p_i) is an integer, where p_i are the k prime factors of n (with multiplicity).

n	a(n)
1	152
2	432
3	1620
4	1728
5	3456
6	4752
7	22464
8	46656
9	80892
10	139968
11	186624
12	237168
13	326592
14	746496
15	1651968
16	2052864
17	2426112
18	2985984
19	5971968
20	10257408
21	12177216
22	12690432
23	14048240
24	14183424
25	20155392
26	20901888
27	26127360
28	38817792

[152, 432, 1620, 1728, 3456, 4752, 22464, 46656, 80892, 139968, 186624, 237168, 326592, 746496, 1651968, 2052864, 2426112, 2985984, 5971968, 10257408, 12177216, 12690432, 14048240, 14183424, 20155392, 20901888, 26127360, 38817792]

cp's OEIS Frontend

A226365 Composite numbers such that Sum_{i=1..k} (1 + 1/p_i) - Product_{i=1..k} (1 + 1/p_i) is an integer, where p_i are the k prime factors of n (with multiplicity).

Table of values

List of values