OFFSET
1,2
COMMENTS
a(n) > n for perfect powers n = A001597(m) for m > 2.
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = A175070(n) + n. [Jaroslav Krizek, Jan 24 2010]
EXAMPLE
For n = 8: a(8) = 10; there are two perfect divisors of 8: 2 and 8; their sum is 10.
MATHEMATICA
Table[Plus @@ (n^(1/Divisors[GCD @@ FactorInteger[n][[All, 2]]])), {n, 72}] (* Ivan Neretin, May 13 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Jan 23 2010
EXTENSIONS
Name edited by Michel Marcus, Jun 13 2018
STATUS
approved