Prime Factors of 855

Steps to find Prime Factors of 855 by Division Method

To find the primefactors of 855 using the division method, follow these steps:

• Step 1. Start dividing 855 by the smallest prime number, i.e., 2, 3, 5, and so on. Find the smallest prime factor of the number.
• Step 2. After finding the smallest prime factor of the number 855, which is 3. Divide 855 by 3 to obtain the quotient (285).
  855 ÷ 3 = 285
• Step 3. Repeat step 1 with the obtained quotient (285).
  285 ÷ 3 = 95
  95 ÷ 5 = 19
  19 ÷ 19 = 1

So, the prime factorization of 855 is, 855 = 3 x 3 x 5 x 19.

Steps to find Prime Factors of 855 by Factor Tree Method

We can follow the same procedure using the factor tree of 855 as shown below:

So, the prime factorization of 855 is, 855 = 3 x 3 x 5 x 19.

Definition of Prime Factors?

In mathematics, prime numbers are defined as all those whole numbers greater than 1 that have only two factors, i.e. 1 and the number itself. When we express any number as the product of these prime numbers than these prime numbers become prime factors of that number. Eg- Prime Factors of 855 are 3 x 3 x 5 x 19.

Properties of Prime Factors

• For any given number there is one and only one set of unique prime factors.
• 2 is the only even prime number. So, any given number can have only one even prime factor and that is 2.
• Two prime factors of a given number are always coprime to each other.
• 1 is neither a prime number nor a composite number and also 1 is the factor of every given number. So, 1 is the factor of 855 but not a prime factor of 855.

Frequently Asked Questions

• Which is the smallest prime factor of 855?

  Smallest prime factor of 855 is 3.

• What are the factors of 855?

  Factors of 855 are 1 , 3 , 5 , 9 , 15 , 19 , 45 , 57 , 95 , 171 , 285 , 855.

• What is prime factorization of 855 in exponential form?

  Prime factorization of 855 in exponential form is 3² x 5 x 19.

• Is 855 a prime number or a composite number?

  855 is a composite number.

• Is 855 a prime number?

  false, 855 is not a prime number.

• What is the sum of all prime factors of 855?

  Prime factors of 855 are 3 x 3 x 5 x 19. Therefore, their sum is 30.

• What is the product of all prime factors of 855?

  Prime factors of 855 are 3 x 3 x 5 x 19. Therefore, their product is 855.

• What numbers are the prime factors of 855?

  Prime factors of 855 are 3 , 3 , 5 , 19.

• What is the sum of all odd prime factors of 855?

  Prime factors of 855 are 3 , 3 , 5 , 19, out of which 3 , 3 , 5 , 19 are odd numbers. So, the sum of odd prime factors of 855 is 3 + 3 + 5 + 19 = 30.