OFFSET
0,2
EXAMPLE
pi(84) = 23 and 84 = 2^2*3*7 and 2+3+5+6+7 = 23.
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Jason Earls, Sep 20 2002
EXTENSIONS
a(6)-a(19) from Donovan Johnson, Oct 12 2008
STATUS
approved