Q:
# What are proper factors?

**Proper factors are factors of a number N that are neither N nor 1.** In general, a factor of N is a whole number, or integer, that divides N without a remainder.

For example, the factors of 20 are 1, 2, 4, 5, 10 and 20. The proper factors of 20 are 2, 4, 5 and 10. Usually, when factoring a number, it is desirable to report only the prime factors, or factors that are also prime numbers. The prime factorization of 20 excludes 4 and 10, because both of these numbers are divisible by 2, and 10 is also divisible by 5.

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Q:
## What are the factors of 9?

A: The factors of 9 are 1, 3 and 9. A factor is a number that divides into another number evenly. When a person divides 9 by the numbers 9, 3 and 1, it is eas... Full Answer >Filed Under: -
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## How do you factor a trinomial?

A: To factor a trinomial in the form ax^2 + bx + c, find all of the factor pairs that multiply into c, and isolate the pair that also adds up to form b. Subst... Full Answer >Filed Under: -
Q:
## What are the factors of 49?

A: The factors of 49 are 1, 7 and 49. The factors of a given number are those numbers that divide into it evenly leaving no remainder. One and the number itse... Full Answer >Filed Under: -
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## What is the prime factorization of 55?

A: The prime factors of 55 are 5 and 11. Prime factorization means finding the prime numbers that can be multiplied together to produce the original number. T... Full Answer >Filed Under: