OFFSET
1,1
COMMENTS
190333 has 10 divisors and 10 digits in its prime factorization. What is the next term in this sequence with more divisors and digits?
2093663 has 12 divisors and 12 digits in its prime factorization. - Harvey P. Dale, Apr 05 2019
Prime factors are counted with multiplicity. - Harvey P. Dale, Apr 05 2019
EXAMPLE
143 is a term because it takes 4 digits to write its prime factorization
143=11*13 and has 4 divisors [1, 11, 13, 143].
MATHEMATICA
ndQ[n_]:=Total[#[[2]]IntegerLength[#[[1]]]&/@FactorInteger[n]] == DivisorSigma[ 0, n]; Select[Range[2, 500], ndQ]
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Jason Earls, Jul 13 2005
STATUS
approved