A335068 - cp's OEIS frontend

A335068 Numbers k where records occur for sigma(k)/sigma(k+1), where sigma(k) is the sum of divisors of k (A000203).

n	a(n)
1	1
2	2
3	4
4	6
5	12
6	30
7	36
8	60
9	180
10	240
11	420
12	840
13	1680
14	2520
15	5040
16	7560
17	12600
18	15120
19	30240
20	55440
21	110880
22	221760
23	332640
24	665280
25	720720
26	1441440
27	2882880
28	3603600
29	4324320
30	10810800
31	24504480
32	36756720
33	41081040
34	43243200
35	64864800
36	73513440
37	122522400
38	183783600

[1, 2, 4, 6, 12, 30, 36, 60, 180, 240, 420, 840, 1680, 2520, 5040, 7560, 12600, 15120, 30240, 55440, 110880, 221760, 332640, 665280, 720720, 1441440, 2882880, 3603600, 4324320, 10810800, 24504480, 36756720, 41081040, 43243200, 64864800, 73513440, 122522400, 183783600]

cp's OEIS Frontend

A335068 Numbers k where records occur for sigma(k)/sigma(k+1), where sigma(k) is the sum of divisors of k (A000203).

Table of values

List of values