401952

Appears in sequences

• Numbers n such that sigma(n) = 4*(n-phi(n)).at n=15A068420
• a(n) = 4 * floor(23*2^n/15).at n=16A102651
• Larger of exponentially-odd amicable numbers pair: numbers m < k such that m = s(k) and k = s(m), where s(k) is the sum of proper exponential-odd divisors of k.at n=12A325848