72335025domain: NAppears in sequencesRow 6 of array in A288580.at n=21A092971Smallest number having exactly n divisors of the form 8*k + 1.at n=28A343104Odd numbers k such that sigma(k) > 2*k and A003415(sigma(k)) < k, where A003415 is the arithmetic derivative, and sigma is the sum of divisors function.at n=25A347890