Answer: factorial

AnswerCrossword Clue
factorialof a factor or a factory
factorialof factors or factorials
factorialthe product of a given positive integer multiplied by all lesser positive integers: The quantity four factorial (4!) = 4 · 3 · 2 · 1 = 24. Symbol:n!, where n is the given integer
factorialrelating to a factor / the product of a series of factors; spec. the product of an integer and all lower integers