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plot sqrt((RiemannSiegelZ[(2*pi*x/ln(2))])^2+((DivisorSum[x, # &]-x)/x)^2), x from 1 to 100
plot sqrt((RiemannSiegelZ[(2*pi*x/ln(2))])^2+((DivisorSum[x, # &]-x)/x)^2), x from 1 to 100
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