Q: What are the prime factors of the number 840,223,530?

 A: 2, 3, 5, 103, 373

Why are those the prime factors of the number 840,223,530?

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 840,223,530

840,223,530
Factor Arrows
2420,111,765
Factor Arrows
3140,037,255
Factor Arrows
346,679,085
Factor Arrows
315,559,695
Factor Arrows
35,186,565
Factor Arrows
31,728,855
Factor Arrows
3576,285
Factor Arrows
3192,095
Factor Arrows
538,419
Factor Arrows
103373

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, 5, 103, 373

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 5 x 103 x 373 = 840,223,530

This can also be written as 21 x 37 x 51 x 1031 x 3731 = 840,223,530

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


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