OFFSET
1,2
COMMENTS
To avoid the redundancy of counting the negatives of the divisors, we consider only divisors having a positive real part.
LINKS
Eric Weisstein's World of Mathematics, Gaussian Integer.
EXAMPLE
a(5) = 6 because 5 is divisible by the Gaussian integers {1, 1-2i, 1+2i, 2-i, 2+i, 5}, which is 6 divisors in all.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Mitch Cervinka (puritan(AT)toast.net), Jan 16 2007
STATUS
approved