458066416

Appears in sequences

• a(n) is the largest positive integer that is abundant and has the same prime signature as A025610(n) or 0 if no such number exists.at n=33A343329
• a(n) is the least k that is a multiple of d=A240991(n), with abundancy ratio sigma(k)/k equal to (sigma(d)+1)/d, or -1 if no such k exists.at n=27A387405