A226479 - cp's OEIS frontend

A226479 Numbers n such that (sopf(n)*d(n))^2 = sigma(n) where sopf(n) = sum of distinct prime factors of n (A008472) and d(n) = number of divisors of n.

n	a(n)
1	22446139
2	26116291
3	28097023
4	30236557
5	31090489
6	31124341
7	39618558
8	41628195
9	49941589
10	51777957
11	61137673
12	62224039
13	66960589
14	71096795
15	71334867
16	71585139
17	72304400
18	82266591
19	83045869
20	92346023
21	92837591
22	105183961
23	114762567
24	117908994
25	123563821

[22446139, 26116291, 28097023, 30236557, 31090489, 31124341, 39618558, 41628195, 49941589, 51777957, 61137673, 62224039, 66960589, 71096795, 71334867, 71585139, 72304400, 82266591, 83045869, 92346023, 92837591, 105183961, 114762567, 117908994, 123563821]

cp's OEIS Frontend

A226479 Numbers n such that (sopf(n)*d(n))^2 = sigma(n) where sopf(n) = sum of distinct prime factors of n (A008472) and d(n) = number of divisors of n.

Table of values

List of values