198990

Appears in sequences

• The ED4 array read by antidiagonals.at n=30A167584
• The third column of the ED4 array A167584.at n=5A167589
• (1+e)-sigma amicable numbers.at n=36A274116
• Lesser of semi-unitary amicable numbers pair: numbers (m, n) such that susigma(m) = susigma(n) = m + n, where susigma(n) is the sum of the semi-unitary divisors of n (A322485).at n=20A322541
• Lesser of modified exponential amicable pairs.at n=17A323758
• Lesser 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=9A325847
• Lesser of recursive amicable numbers pair: numbers m < k such that m = s(k) and k = s(m), where s(k) = A333926(k) - k is the sum of proper recursive divisors of k.at n=19A333929