In Mathematical Terms, What Does "factor" Mean?

By Staff WriterLast Updated Apr 10, 2020 10:04:45 AM ET
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A factor is a number or expression that divides another number or expression evenly without a remainder. For instance, two, four, five and 10 are factors of 20 because 20 can be divided by all those smaller numbers an exact number of times. Prime numbers are positive integers greater than one that have exactly two factors. A composite number has more than two factors.