Q: What are the prime factors of the number 402,435?

 A: 3, 5, 11, 271

Why are those the prime factors of the number 402,435?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 402,435

402,435
Factor Arrows
3134,145
Factor Arrows
344,715
Factor Arrows
314,905
Factor Arrows
52,981
Factor Arrows
11271

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

3, 5, 11, 271

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 5 x 11 x 271 = 402,435

This can also be written as 33 x 51 x 111 x 2711 = 402,435

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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