Q: What are the prime factors of the number 629,888?

 A: 2, 7, 19, 37

Why are those the prime factors of the number 629,888?

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 629,888

629,888
Factor Arrows
2314,944
Factor Arrows
2157,472
Factor Arrows
278,736
Factor Arrows
239,368
Factor Arrows
219,684
Factor Arrows
29,842
Factor Arrows
24,921
Factor Arrows
7703
Factor Arrows
1937

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, 7, 19, 37

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 7 x 19 x 37 = 629,888

This can also be written as 27 x 71 x 191 x 371 = 629,888

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


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