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Both n and the smallest number with n divisors are in A002182.
1

%I #15 Apr 29 2018 02:20:29

%S 1,2,4,6,12,24,36,48,60,120,180,240,360,720,1680,5040,10080,20160

%N Both n and the smallest number with n divisors are in A002182.

%C Question: is this sequence finite? See A189394 for detailed information.

%C Intersection of A002182 and A002183. - _Jianing Song_, Apr 03 2018

%F a(n) = tau(A189394(n)) = A000005(A189394(n)). - _Jianing Song_, Apr 03 2018

%e Both 20160 and the smallest number with 20160 divisors, 195643523275200, are in A002182, so 20160 is a term.

%Y Cf. A002182, A002183, A189394.

%K more,nonn

%O 1,2

%A _J. Lowell_, Aug 02 2008

%E a(16)-a(18) from _Jianing Song_, Apr 03 2018