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In the American system, 10^(30).

In the American system, 10^(60).

In the American system, 10^(27).

In the American system, 10^(57).

In the American system, 10^(15).

Let sigma(m) be the divisor function of m. Then two numbers m and n are a quasiamicable pair if sigma(m)=sigma(n)=m+n+1. The first few are (48, 75), (140, 195), (1050, 1925), ...

In the American system, 10^(45).

In the American system, 10^(48).

In the American system, 10^(18).

The notation R^_ denotes the set of affinely extended real numbers.