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%I #6 Dec 15 2017 17:36:27
%S 72,576,648,750,800,900,960,1080,3430,4116,4900,5880,6272,7000,7056,
%T 7938,8400,8960,9450,10080,10752,11340,12096,13608,18750,20000,22500,
%U 24000,25600,27000,28800,30375,30720,32400,34560,36450,36864,37268
%N Numbers n such that sopfr(n)/spf(n) is a semiprime and sopfr(n)/lpf(n) is a semiprime, where sopfr(n) = A001414(n) is sum of primes dividing n (with repetition), spf(n) and lpf(n) are smallest and largest primes dividing n, respectively. Also, spf(n)!=lpf(n).
%e 648=2^3*3^4 is a term because 2+2+2+3+3+3+3 = 18 and 18/2 = 9 and 18/3 = 6.
%K nonn
%O 1,1
%A _Jason Earls_, Jul 19 2003
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