A375574 - cp's OEIS frontend

A375574 Let d(1) denote the divisors of an integer k. a(n) = k is the smallest k such that the sum of its first n divisors, s = d(1) + ... + d(n), is also a divisor of k.

n	a(n)
1	1
2	6
3	6
4	28
5	28
6	24
7	126
8	234
9	224
10	360
11	504
12	980
13	990
14	1260
15	1764
16	1680
17	840
18	1080
19	4140
20	960
21	5760
22	4620
23	9180
24	11088
25	8960
26	6120
27	11880
28	25740
29	7140
30	2520
31	2016
32	25344
33	9720
34	48672
35	11760
36	10920
37	15120
38	14112
39	61740
40	55200
41	74340
42	91800
43	8190
44	78624
45	70200

[1, 6, 6, 28, 28, 24, 126, 234, 224, 360, 504, 980, 990, 1260, 1764, 1680, 840, 1080, 4140, 960, 5760, 4620, 9180, 11088, 8960, 6120, 11880, 25740, 7140, 2520, 2016, 25344, 9720, 48672, 11760, 10920, 15120, 14112, 61740, 55200, 74340, 91800, 8190, 78624, 70200]

cp's OEIS Frontend

A375574 Let d(1) denote the divisors of an integer k. a(n) = k is the smallest k such that the sum of its first n divisors, s = d(1) + ... + d(n), is also a divisor of k.

Table of values

List of values