The two factors of 17 are 1 and 17. Because 17 only has one set of factors, or factor pair, it is a prime number. This means it can only be divided by 1 and itself.
A factor is a number that can be multiplied to produce another number. In this example, 17 is a prime number because it can only be divided evenly, or without leaving a remainder, by itself and 1. Some other prime numbers are 2, 3, 5, 7, 11, 13 and 19. Composite numbers, on the other hand, have more than one factor pair or factorization.
Factoring is useful in algebra and more advanced mathematics, such as calculus, when dealing with quadratics, trinomials and polynomial equations.
Learn MoreThe factors of 21 are 1, 3, 7 and 21. A factor is a number that can divide evenly into a given number. Because 21 can be divided by numbers other than itself and 1, it is called a composite number.
Full Answer >The factors of 48 include 1, 2, 3, 4, 6, 8, 12, 16, 24 and 48. The number 48 is divisible by each of the factors without any remainder being left over.
Full Answer >The factors of 27 are one, three, nine and 27. The factors of a particular number are those numbers that divide evenly into it. One and the number itself are always factors of any given number.
Full Answer >The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 and 72. Factors are the numbers that can be multiplied together to get 72.
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