1,2

a(n) > n for perfect powers n = A001597(m) for m > 2.

Table of n, a(n) for n=1..72.

a(n) = A175070(n) + n. [From Jaroslav Krizek, Jan 24 2010]

For n = 8: a(8) = 10; there are two perfect divisors of 8: 2 and 8; their sum is 10.

Sequence in context: A093783 A096861 A118738 * A051377 A057723 A142151

Adjacent sequences: A175064 A175065 A175066 * A175068 A175069 A175070

nonn

Jaroslav Krizek, Jan 23 2010

approved