OFFSET
1,1
COMMENTS
LINKS
EXAMPLE
1561 is in the sequence because 1561 has 4 divisors {1, 7, 223, 1561}, 1 + 7 + 223 + 1561 = 1792 and 1651 has 4 divisors {1, 13, 127, 1651}, 1 + 13 + 127 + 1651 = 1792.
MATHEMATICA
Select[Range[1500000], !PalindromeQ[#1] && DivisorSigma[0, #1] == DivisorSigma[0, FromDigits[Reverse[IntegerDigits[#1]]]] && DivisorSigma[1, #1] == DivisorSigma[1, FromDigits[Reverse[IntegerDigits[#1]]]] & ]
PROG
(PARI) R(n) = eval(concat(Vecrev(Str(n))));
isok(n) = n != R(n) && numdiv(n) == numdiv(R(n)) && sigma(n) == sigma(R(n));
for(n=1561, 1473302, if(isok(n), print1(n, ", "))) \\ Indranil Ghosh, Mar 06 2017
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Ilya Gutkovskiy, Jan 01 2017
STATUS
approved