OFFSET
1,1
EXAMPLE
8842 is in the sequence because its divisors are [1, 2, 4421, 8842] and 1+2+(4*4*2*1)+(8*8*4*2) = 547, a prime.
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Jason Earls, May 21 2004
STATUS
approved