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 30?

A: The factors of 30 are 1, 2, 3, 5, 6, 10, 15 and 30. A number is considered the factor of another number when it can be evenly divided into that number. Full Answer >Filed Under: -
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## What is the difference between a factor and a multiple?

A: The factors of a number are all the integers that can be multiplied together to produce that number. For example, 1, 2, 3 and 6 are all factors of 6. Multi... Full Answer >Filed Under: -
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## How do you factor (x^2-2x-4)?

A: The expression (x^2 - 2x - 4) factors as (x + 1 - sqrt(5))*(x + 1 + sqrt(5)), where sqrt(5) is the square root of 5. This quadratic polynomial is factored ... Full Answer >Filed Under: -
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## What are the factors of 65?

A: The factors of 65 are one, five, 13 and 65. These are the only natural numbers that have 65 as a product when multiplied by one or more other numbers. Full Answer >Filed Under: