A319800 - cp's OEIS frontend

A319800 Numbers k such that Sum_{d|k} nphi(d) = k where the sum is over nonunitary divisors of k and nphi(k) is the nonunitary totient function (A254503).

n	a(n)
1	3960
2	5220
3	1873080
4	6733440
5	8447040
6	18685336320
7	255306083760
8	341863562880
9	357274165248
10	765899971200
11	1018887932160
12	16733804567040
13	19602402019200
14	21205959667200
15	79205761958400
16	166967788700160
17	189585719769600
18	279604120561920
19	623380501094400

[3960, 5220, 1873080, 6733440, 8447040, 18685336320, 255306083760, 341863562880, 357274165248, 765899971200, 1018887932160, 16733804567040, 19602402019200, 21205959667200, 79205761958400, 166967788700160, 189585719769600, 279604120561920, 623380501094400]

cp's OEIS Frontend

A319800 Numbers k such that Sum_{d|k} nphi(d) = k where the sum is over nonunitary divisors of k and nphi(k) is the nonunitary totient function (A254503).

Table of values

List of values