Steps to find Prime Factors of 1985 by Division Method

To find the primefactors of 1985 using the division method, follow these steps:

  • Step 1. Start dividing 1985 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 1985, which is 5. Divide 1985 by 5 to obtain the quotient (397).
    1985 ÷ 5 = 397
  • Step 3. Repeat step 1 with the obtained quotient (397).
    397 ÷ 397 = 1

So, the prime factorization of 1985 is, 1985 = 5 x 397.

Steps to find Prime Factors of 1985 by Factor Tree Method

We can follow the same procedure using the factor tree of 1985 as shown below:

So, the prime factorization of 1985 is, 1985 = 5 x 397.

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 1985 are 5 x 397.

Properties of Prime Factors

  • Prime factors are the set of factors that are unique to the number given.
  • 2 is the only even prime factor any number can have.
  • Two prime factors 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 1985 but not a prime factor of 1985.

Frequently Asked Questions

  • Which is the smallest prime factor of 1985?

    Smallest prime factor of 1985 is 5.

  • What is the prime factorization of 1985?

    Prime factorization of 1985 is 5 x 397.

  • What is prime factorization of 1985 in exponential form?

    Prime factorization of 1985 in exponential form is 5 x 397.

  • Is 1985 a prime number or a composite number?

    1985 is a composite number.

  • Is 1985 a prime number?

    false, 1985 is not a prime number.

  • How to find prime factorization of 1985 easily?

    To find prime factorization of 1985 easily you can refer to the steps given on this page step by step.

  • Which is the largest prime factors of 1985?

    The largest prime factor of 1985 is 397.

  • What is the product of all prime factors of 1985?

    Prime factors of 1985 are 5 x 397. Therefore, their product is 1985.

  • What is the sum of all odd prime factors of 1985?

    Prime factors of 1985 are 5 , 397, out of which 5 , 397 are odd numbers. So, the sum of odd prime factors of 1985 is 5 + 397 = 402.