A number 
for which the product of divisors
is equal to 
. The first few are 1, 6, 8, 10, 14, 15, 21, 22, ... (OEIS
A007422).
Multiplicative Perfect Number
See also
Perfect NumberExplore with Wolfram|Alpha
References
Sloane, N. J. A. Sequence A007422/M4068 in "The On-Line Encyclopedia of Integer Sequences."Referenced on Wolfram|Alpha
Multiplicative Perfect NumberCite this as:
Weisstein, Eric W. "Multiplicative Perfect Number." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/MultiplicativePerfectNumber.html