Q: What are the prime factors of the number 423,134,240?

 A: 2, 5, 1009, 2621

Why are those the prime factors of the number 423,134,240?

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 423,134,240

423,134,240
Factor Arrows
2211,567,120
Factor Arrows
2105,783,560
Factor Arrows
252,891,780
Factor Arrows
226,445,890
Factor Arrows
213,222,945
Factor Arrows
52,644,589
Factor Arrows
1,0092,621

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, 5, 1009, 2621

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 1,009 x 2,621 = 423,134,240

This can also be written as 25 x 51 x 1,0091 x 2,6211 = 423,134,240

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


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