# Prime Factors of 155

Prime Factors of 155 are 5 and 31

#### How to find prime factors of a number

 1.   Prime Factorization of 155 by Division Method 2.   Prime Factorization of 155 by Factor Tree Method 3.   Definition of Prime Factors 4.   Frequently Asked Questions

#### Steps to find Prime Factors of 155 by Division Method

To find the primefactors of 155 using the division method, follow these steps:

• Step 1. Start dividing 155 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 155, which is 5. Divide 155 by 5 to obtain the quotient (31).
155 ÷ 5 = 31
• Step 3. Repeat step 1 with the obtained quotient (31).
31 ÷ 31 = 1

So, the prime factorization of 155 is, 155 = 5 x 31.

#### Steps to find Prime Factors of 155 by Factor Tree Method

We can follow the same procedure using the factor tree of 155 as shown below:

So, the prime factorization of 155 is, 155 = 5 x 31.

#### 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 155 are 5 x 31.

#### 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 155 but not a prime factor of 155.

• Which is the smallest prime factor of 155?

Smallest prime factor of 155 is 5.

• Is 155 a perfect square?

No 155 is not a perfect square.

• What is the prime factorization of 155?

Prime factorization of 155 is 5 x 31.

• What is prime factorization of 155 in exponential form?

Prime factorization of 155 in exponential form is 5 x 31.

• Is 155 a prime number?

false, 155 is not a prime number.

• Which is the largest prime factors of 155?

The largest prime factor of 155 is 31.

• What is the product of all prime factors of 155?

Prime factors of 155 are 5 x 31. Therefore, their product is 155.

• What is the sum of all odd prime factors of 155?

Prime factors of 155 are 5 , 31, out of which 5 , 31 are odd numbers. So, the sum of odd prime factors of 155 is 5 + 31 = 36.

• What is the product of all odd prime factors of 155?

Prime factors of 155 are 5 , 31, out of which 5 , 31 are odd numbers. So, the product of odd prime factors of 155 is 5 x 31 = 155.