Q: What are the prime factors of the number 634,880?

 A: 2, 5, 31

Why are those the prime factors of the number 634,880?

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 634,880

634,880
Factor Arrows
2317,440
Factor Arrows
2158,720
Factor Arrows
279,360
Factor Arrows
239,680
Factor Arrows
219,840
Factor Arrows
29,920
Factor Arrows
24,960
Factor Arrows
22,480
Factor Arrows
21,240
Factor Arrows
2620
Factor Arrows
2310
Factor Arrows
2155
Factor Arrows
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, 5, 31

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 2 x 2 x 2 x 5 x 31 = 634,880

This can also be written as 212 x 51 x 311 = 634,880

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


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