A number which is an Integer multiple of the Sum of its Unitary Divisors is called a unitary -multiperfect number. There are no Odd unitary multiperfect numbers.

**References**

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

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1999-05-26