Numbers n such that sum k/d(k) is an integer, where d(k) is the k-th divisor of n (the divisors of n are in decreasing order).

A073083

Numbers n such that sum k/d(k) is an integer, where d(k) is the k-th divisor of n (the divisors of n are in decreasing order).

Terms

    a(0) =1a(1) =10a(2) =12a(3) =24a(4) =615a(5) =4066a(6) =7960a(7) =30432a(8) =49260a(9) =133686a(10) =440286a(11) =1201644a(12) =6640812a(13) =126953125a(14) =411106256a(15) =1046704882a(16) =11046706752a(17) =44588839041

External references