Composite numbers whose number of proper divisors has a number of proper divisors which has a prime number of proper divisors.
A223457
Composite numbers whose number of proper divisors has a number of proper divisors which has a prime number of proper divisors.
Terms
- a(0) =44100a(1) =46656a(2) =57600a(3) =65536a(4) =108900a(5) =112896a(6) =152100a(7) =213444a(8) =260100a(9) =278784a(10) =298116a(11) =313600a(12) =324900a(13) =331776a(14) =389376a(15) =476100a(16) =509796a(17) =592900a(18) =636804a(19) =656100a(20) =665856a(21) =736164a(22) =756900a(23) =774400a(24) =828100a(25) =831744a(26) =864900a(27) =933156a(28) =1000000a(29) =1081600
External references
- oeis: A223457