Q: What are the prime factors of the number 401,522,400?

 A: 2, 3, 5, 29, 641

Why are those the prime factors of the number 401,522,400?

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 401,522,400

401,522,400
Factor Arrows
2200,761,200
Factor Arrows
2100,380,600
Factor Arrows
250,190,300
Factor Arrows
225,095,150
Factor Arrows
212,547,575
Factor Arrows
34,182,525
Factor Arrows
31,394,175
Factor Arrows
3464,725
Factor Arrows
592,945
Factor Arrows
518,589
Factor Arrows
29641

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, 29, 641

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 5 x 5 x 29 x 641 = 401,522,400

This can also be written as 25 x 33 x 52 x 291 x 6411 = 401,522,400

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


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