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Unitary Divisor

A Divisor $d$ of $c$ for which

\mathop{\rm GCD}\nolimits (d,c/d) = 1,

where GCD is the Greatest Common Divisor.

See also Divisor, Greatest Common Divisor, Unitary Perfect Number


Guy, R. K. ``Unitary Perfect Numbers.'' §B3 in Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, pp. 53-59, 1994.

© 1996-9 Eric W. Weisstein