Number of divisors of n that are at most sqrt(n).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =2a(6) =1a(7) =2a(8) =2a(9) =2a(10) =1a(11) =3a(12) =1a(13) =2a(14) =2a(15) =3a(16) =1a(17) =3a(18) =1a(19) =3a(20) =2a(21) =2a(22) =1a(23) =4a(24) =2a(25) =2a(26) =2a(27) =3a(28) =1a(29) =4