a(n) is the smallest integer m such that n is the least exponent k satisfying sigma(m)^k divides m.
A264155
a(n) is the smallest integer m such that n is the least exponent k satisfying sigma(m)^k divides m.
Terms
- a(0) =1a(1) =24a(2) =40a(3) =384a(4) =486a(5) =6144a(6) =640a(7) =18688a(8) =39366a(9) =91136a(10) =10240a(11) =23482368a(12) =958464a(13) =52612659a(14) =163840a(15) =375717888a(16) =9568256a(17) =1502871552a(18) =2621440a(19) =353370112a(20) =186646528
External references
- oeis: A264155