Q: What are the prime factors of the number 783,872?

 A: 2, 1531

Why are those the prime factors of the number 783,872?

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 783,872

783,872
Factor Arrows
2391,936
Factor Arrows
2195,968
Factor Arrows
297,984
Factor Arrows
248,992
Factor Arrows
224,496
Factor Arrows
212,248
Factor Arrows
26,124
Factor Arrows
23,062
Factor Arrows
21,531

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, 1531

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 1,531 = 783,872

This can also be written as 29 x 1,5311 = 783,872

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


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