A226480 - cp's OEIS frontend

A226480 Squarefree numbers n such that (sopf(n)*d(n))^2 = sigma(n) where sopf(n) = sum of prime factors of n and d(n) = number of divisors of n.

n	a(n)
1	22446139
2	26116291
3	28097023
4	30236557
5	31090489
6	31124341
7	49941589
8	61137673
9	62224039
10	66960589
11	71334867
12	71585139
13	82266591
14	83045869
15	92346023
16	92837591
17	105183961
18	114762567
19	123563821
20	130399138
21	131494219
22	134156197
23	134867722
24	135095767
25	136026037

[22446139, 26116291, 28097023, 30236557, 31090489, 31124341, 49941589, 61137673, 62224039, 66960589, 71334867, 71585139, 82266591, 83045869, 92346023, 92837591, 105183961, 114762567, 123563821, 130399138, 131494219, 134156197, 134867722, 135095767, 136026037]

cp's OEIS Frontend

A226480 Squarefree numbers n such that (sopf(n)*d(n))^2 = sigma(n) where sopf(n) = sum of prime factors of n and d(n) = number of divisors of n.

Table of values

List of values