Factors of 642 are integers that can be divided evenly into 642. It has a total of 8 factors of which 642 is the biggest factor and the positive factors of 642 are 1, 2, 3, 6, 107, 214, 321, 642. The Pair Factors of 642 are (1, 642), (2, 321), (3, 214), (6, 107) and its Prime Factors are 2 × 3 × 107.

• All Factors of 642: 1, 2, 3, 6, 107, 214, 321 and 642
• Negative Factors of 642: -1, -2, -3, -6, -107, -214, -321 and -642
• Prime Factors of 642: 2, 3, 107
• Prime Factorization of 642: 2¹ × 3¹ × 107¹
• Sum of Factors of 642: 1296

1.	What Are the Factors of 642?
2.	Factors of 642 by Prime Factorization
3.	Factors of 642 in Pairs
4.	FAQs on Factors of 642

Factors of 642 are pairs of those numbers whose products result in 642. These factors are either prime numbers or composite numbers.

How to Find the Factors of 642?

To find the factors of 642, we will have to find the list of numbers that would divide 642 without leaving any remainder.

• 642/214 = 3; therefore, 214 is a factor of 642 and 3 is also a factor of 642.
• 642/107 = 6; therefore, 107 is a factor of 642 and 6 is also a factor of 642.

Similarly we can find other factors. Hence, the factors of 642 are 1, 2, 3, 6, 107, 214, 321, 642.

☛ Also Check:

• Factors of 125 - The factors of 125 are 1, 5, 25, 125
• Factors of 121 - The factors of 121 are 1, 11, 121
• Factors of 99 - The factors of 99 are 1, 3, 9, 11, 33, 99
• Factors of 38 - The factors of 38 are 1, 2, 19, 38
• Factors of 12 - The factors of 12 are 1, 2, 3, 4, 6, 12

The number 642 is composite and therefore it will have prime factors. Now let us learn how to calculate the prime factors of 642. The first step is to divide the number 642 with the smallest prime factor, here it is 2. We keep dividing until it gives a non-zero remainder.

• 642 ÷ 2 = 321

Further dividing 321 by 2 gives a non-zero remainder. So we stop the process and continue dividing the number 321 by the next smallest prime factor. We stop ultimately if the next prime factor doesn't exist or when we can't divide any further.

So, the prime factorization of 642 can be written as 2¹ × 3¹ × 107¹ where 2, 3, 107 are prime.

Pair factors of 642 are the pairs of numbers that when multiplied give the product 642. The factors of 642 in pairs are:

• 1 × 642 = (1, 642)
• 2 × 321 = (2, 321)
• 3 × 214 = (3, 214)
• 6 × 107 = (6, 107)

Negative pair factors of 642 are:

• -1 × -642 = (-1, -642)
• -2 × -321 = (-2, -321)
• -3 × -214 = (-3, -214)
• -6 × -107 = (-6, -107)

NOTE: If (a, b) is a pair factor of a number then (b, a) is also a pair factor of that number.