1/(1-1/2^s-(1-1/2^s)*1/3^s-(1-1/2^s)*(1-1/3^s)*1/5^s-(1-1/2^s)*(1-1/3^s)*(1-1/5^s)*1/7^s-・・・-Π[k=1→n-1](1-1/p(k)^s)*1/p(n)^s)

Σ(1/(a^n1*b^n2*c^n3)^s=1/(1-1/a^s-(1-1/a^s)*1/b^s-(1-1/a^s)*(1-1/b^s)*1/c^s)