Numbers of divisors of orders of sporadic simple groups.

Terms

a(0) =60a(1) =112a(2) =128a(3) =192a(4) =192a(5) =384a(6) =480a(7) =384a(8) =704a(9) =896a(10) =1056a(11) =1920a(12) =2688a(13) =3200a(14) =2816a(15) =4256a(16) =4320a(17) =5880a(18) =16128a(19) =16896a(20) =25536a(21) =26400a(22) =45056a(23) =143616a(24) =1580544a(25) =424488960