# Prime factorization of 399

Here you will see step by step solution of prime factorization of 399, how to find factors of 399, you will see all factors of 399, how many factors of 399 has? Factors of 399 are 1, 3, 7, 19, 21, 57, 133, 399, we can see that 399 has 8 factor and sum of all factors is 640.

• All Factors of 399: 1, 3, 7, 19, 21, 57, 133, 399
• Prime Factors of 399: 3 × 7 × 19
• Prime Factorization of 399: 31 × 71 × 191
• Sum of Factors of 399: 640
• Is 399 prime number: No

### How to find factors of 399 by Division Method?

To find the factors of 399 by division method, we need the find the all numbers between 1 to 399, which divide 399 with 0 remainder, then the number is factor of 399.

### Pair factors of 399

• 399/1 = 399 [ 1 × 399 (1, 399) 1 and 399 is pair factor of 399]
• 399/3 = 133 [ 3 × 133 (3, 133) 3 and 133 is pair factor of 399]
• 399/7 = 57 [ 7 × 57 (7, 57) 7 and 57 is pair factor of 399]
• 399/19 = 21 [ 19 × 21 (19, 21) 19 and 21 is pair factor of 399]
• 399/21 = 19 [ 21 × 19 (21, 19) 21 and 19 is pair factor of 399]
• 399/57 = 7 [ 57 × 7 (57, 7) 57 and 7 is pair factor of 399]
• 399/133 = 3 [ 133 × 3 (133, 3) 133 and 3 is pair factor of 399]
• 399/399 = 1 [ 399 × 1 (399, 1) 399 and 1 is pair factor of 399]

As we checked numbers between 1 to 399 that are not leaving any remainder, hence we can say factors of 399 is 1, 3, 7, 19, 21, 57, 133, 399.

Also note that, in exponential form prime factorization of 399 is written as 31 × 71 × 191 and it is a composite number.

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