OFFSET
1,1
COMMENTS
a(15) > 10^10. - Donovan Johnson, Apr 19 2013
EXAMPLE
The proper divisors of 649 are 1, 11, 59 and its anti-divisors are 2, 3, 22, 118, 433. Their sum 1+11+59+2+3+22+118+433 is equal to 649.
MAPLE
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Paolo P. Lava, Apr 17 2013
EXTENSIONS
a(12)-a(14) from Donovan Johnson, Apr 19 2013
STATUS
approved