Numbers m that are not practical and have an abundancy index sigma(m)/m which is larger than that of any smaller number that is not practical.

A335030

Numbers m that are not practical and have an abundancy index sigma(m)/m which is larger than that of any smaller number that is not practical.

Terms

    a(0) =3a(1) =9a(2) =10a(3) =44a(4) =70a(5) =102a(6) =350a(7) =372a(8) =1608a(9) =3492a(10) =6096a(11) =10380a(12) =44040a(13) =100260a(14) =180240a(15) =425160a(16) =1744560a(17) =2425080a(18) =5509980a(19) =10048080a(20) =23614920a(21) =97639920a(22) =396315360a(23) =900229680a(24) =2519017200a(25) =3113704440a(26) =12870562320a(27) =52307529120

External references