Deeply composite numbers: numbers n where sigma_k(n) increases to a record for all sufficiently low (i.e., negative) values of k.

A095848

Deeply composite numbers: numbers n where sigma_k(n) increases to a record for all sufficiently low (i.e., negative) values of k.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =6a(4) =12a(5) =24a(6) =48a(7) =60a(8) =120a(9) =240a(10) =360a(11) =420a(12) =840a(13) =1680a(14) =2520a(15) =5040a(16) =10080a(17) =15120a(18) =25200a(19) =27720a(20) =55440a(21) =110880a(22) =166320a(23) =277200a(24) =360360a(25) =720720a(26) =1441440a(27) =2162160a(28) =3603600a(29) =7207200

External references