87633

Appears in sequences

• Larger of amicable pair.at n=11A002046
• Amicable numbers.at n=24A063990
• Expansion of (1+x^2)/((1-x)^2*(1-x^2)^2*(1-x^3)^2*(1-x^8)*(1-x^9)*(1-x^10)).at n=34A069956
• List of numbers which are both amicable and friendly.at n=3A140688
• Conjectured list of multisociable numbers.at n=37A183019
• Numbers k such that sigma(k) = sigma(sigma(k)-k).at n=28A206708
• The larger companion to the deficient numbers in A212608.at n=25A212609
• Deficient numbers whose aliquot sequence is deficient, abundant, deficient, ..., etc.at n=22A234970
• Number of compositions of n, where the difference between the number of odd parts and the number of even parts is 9.at n=13A242507
• Let us denote 's' the sum of the deficient numbers in the aliquot parts of x. Sequence lists numbers x such that sigma(s)-s is equal to x.at n=21A254879
• Amicable pairs.at n=23A259180
• Amicable pairs (x < y) ordered by nondecreasing sum (x + y) and then by increasing x.at n=23A259933
• Larger of amicable pair (x, y) as they are listed in A259933.at n=11A260087
• Amicable pairs of odd numbers.at n=5A262623
• Odd amicable numbers.at n=5A262625
• (1+e)-sigma amicable numbers.at n=25A274116
• Amicable pairs with the property that the number of divisors of the smaller member is greater than the number of divisors of the larger member.at n=11A328063
• Amicable pairs with the property that the number of divisors of the smaller member is twice the number of divisors of the larger member.at n=9A328065
• Larger 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=12A333930
• Larger of amicable pair (a, b) such that the sum of their number of divisors d(a) + d(b) sets a new record.at n=6A339679