Amicable Quadruple
An amicable quadruple as a Quadruple 
such that
where
is the Divisor Function.
References
Guy, R. K. Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, p. 59, 1994.
- Martingale
- Mascheroni Constant
- Mascheroni Construction
- Maschke's Theorem
- Mason's abc Theorem
- Mason's Theorem
- Masser-Gramain Constant
- Match Problem
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- Mathematical Induction
- Mathematics
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