Factors of 393 are integers that can be divided evenly into 393. There are overall 4 factors of 393 among which 393 is the biggest factor and its positive factors are 1, 3, 131, 393. The Pair Factors of 393 are (1, 393), (3, 131) and its Prime Factors are 3 × 131.

• All Factors of 393: 1, 3, 131 and 393
• Negative Factors of 393: -1, -3, -131 and -393
• Prime Factors of 393: 3, 131
• Prime Factorization of 393: 3¹ × 131¹
• Sum of Factors of 393: 528

1.	What Are the Factors of 393?
2.	Factors of 393 by Prime Factorization
3.	Factors of 393 in Pairs
4.	FAQs on Factors of 393

Factors of 393 are pairs of those numbers whose products result in 393. These factors are either prime numbers or composite numbers.

How to Find the Factors of 393?

To find the factors of 393, we will have to find the list of numbers that would divide 393 without leaving any remainder.

• 393/131 = 3; therefore, 131 is a factor of 393 and 3 is also a factor of 393.
• 393/393 = 1; therefore, 393 is a factor of 393 and 1 is also a factor of 393.

Similarly we can find other factors. Hence, the factors of 393 are 1, 3, 131, 393.

☛ Also Check:

• Factors of 108 - The factors of 108 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108
• Factors of 55 - The factors of 55 are 1, 5, 11, 55
• Factors of 78 - The factors of 78 are 1, 2, 3, 6, 13, 26, 39, 78
• Factors of 29 - The factors of 29 are 1, 29
• Factors of 6 - The factors of 6 are 1, 2, 3, 6

The number 393 is composite and therefore it will have prime factors. Now let us learn how to calculate the prime factors of 393. The first step is to divide the number 393 with the smallest prime factor, here it is 3. We keep dividing until it gives a non-zero remainder.

• 393 ÷ 3 = 131

Further dividing 131 by 3 gives a non-zero remainder. So we stop the process and continue dividing the number 131 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 393 can be written as 3¹ × 131¹ where 3, 131 are prime.

Pair factors of 393 are the pairs of numbers that when multiplied give the product 393. The factors of 393 in pairs are:

• 1 × 393 = (1, 393)
• 3 × 131 = (3, 131)

Negative pair factors of 393 are:

• -1 × -393 = (-1, -393)
• -3 × -131 = (-3, -131)

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