Q: What are the prime factors of the number 203,423,040?

 A: 2, 3, 5, 23, 37, 83

Why are those the prime factors of the number 203,423,040?

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 203,423,040

203,423,040
Factor Arrows
2101,711,520
Factor Arrows
250,855,760
Factor Arrows
225,427,880
Factor Arrows
212,713,940
Factor Arrows
26,356,970
Factor Arrows
23,178,485
Factor Arrows
31,059,495
Factor Arrows
3353,165
Factor Arrows
570,633
Factor Arrows
233,071
Factor Arrows
3783

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, 23, 37, 83

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 3 x 3 x 5 x 23 x 37 x 83 = 203,423,040

This can also be written as 26 x 32 x 51 x 231 x 371 x 831 = 203,423,040

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


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