Q: What are the prime factors of the number 783,432?

 A: 2, 3, 13, 31

Why are those the prime factors of the number 783,432?

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 783,432

783,432
Factor Arrows
2391,716
Factor Arrows
2195,858
Factor Arrows
297,929
Factor Arrows
332,643
Factor Arrows
310,881
Factor Arrows
33,627
Factor Arrows
31,209
Factor Arrows
3403
Factor Arrows
1331

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:

2, 3, 13, 31

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 13 x 31 = 783,432

This can also be written as 23 x 35 x 131 x 311 = 783,432

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


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