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Dickson (1913, 2005) defined an amicable triple to be a triple of three numbers (l,m,n) such that s(l) = m+n (1) s(m) = l+n (2) s(n) = l+m, (3) where s(n) is the restricted ...

In the American system, 10^(303).

In the American system, 10^(33).

In the American system, 10^(39).

A divisor which is not a proper divisor.

The first few numbers not known to produce palindromes when applying the 196-algorithm (i.e., a reverse-then-add sequence) are sometimes known as Lychrel numbers. This term ...

The Greek word for 10000.

In the American system, 10^(30).

In the American system, 10^(60).

In the American system, 10^(27).