Integers m such that there is exactly one k < m with sigma(k)/k > sigma(m)/m, sigma(m) being the sum of the divisors of m.

A247022

Integers m such that there is exactly one k < m with sigma(k)/k > sigma(m)/m, sigma(m) being the sum of the divisors of m.

Terms

    a(0) =3a(1) =8a(2) =18a(3) =30a(4) =72a(5) =168a(6) =420a(7) =3360a(8) =7560a(9) =12600a(10) =20160a(11) =30240a(12) =32760a(13) =50400a(14) =65520a(15) =83160a(16) =131040a(17) =221760a(18) =831600a(19) =1081080a(20) =1663200a(21) =1801800a(22) =2882880a(23) =6486480a(24) =12252240a(25) =24504480a(26) =41081040a(27) =43243200a(28) =68468400a(29) =82162080

External references