67258domain: NAppears in sequencesNumbers k such that the sum of the digits of sigma(k)^k is divisible by k.at n=18A109659Numbers L such that there is a prime p <= L for which v_p(H_L - 1) > 1, where v_p(x) is the p-adic valuation of x and H_L is the L-th harmonic number.at n=5A335207