Smallest number m such that m has exactly n distinct prime factors and sigma(m) has exactly n distinct prime factors.

A152617

Smallest number m such that m has exactly n distinct prime factors and sigma(m) has exactly n distinct prime factors.

Terms

    a(0) =2a(1) =6a(2) =60a(3) =1140a(4) =22230a(5) =778050a(6) =28787850a(7) =1237877550a(8) =82937795850

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