A:### Quick Answer

**The factors of 81 are 1, 3, 9, 27 and 81.** If a number is divisible by another number, it is a factor of the given number. If there is a remainder, it cannot be a factor of the given number.

Every number is a factor of itself. The number one is a factor of every number. Thus, every number except 1 has at least two factors. Prime factors are numbers that are factors and prime at the same time. The number 81 has five factors but only one prime factor, the number 3. Factorization is very important in algebra.

Learn more about Arithmetic- Q:
## What are the factors of 56?

A:

Full Answer >**The factors of 56 are 1, 2, 4, 7, 8, 14, 28 and 56.**Of these factors, 1, 2 and 7 are prime numbers. Therefore, they are the prime factors of 56.Filed Under: - Q:
## What are the factors of 90?

A:

Full Answer >**The factors of 90 are one, two, three, five, six, nine, 10, 15, 18, 30, 45 and 90.**Factors are whole number that can divide into another number leaving no remainder (no decimals).Filed Under: - Q:
## What are all the factors of 42?

A:

Full Answer >**The factors of 42 are 1, 2, 3, 6, 7, 14, 21 and 42.**These numbers are all of those used in multiplication for finding the result 42.Filed Under: - Q:
## What are the factors of 95?

A:

Full Answer >**The factors of 95 are 1, 5, 19 and 95.**Of these factors, both 5 and 19 are prime numbers and, therefore, prime factors.Filed Under: