Q: What are the prime factors of the number 401,441,120?

 A: 2, 5, 19, 37, 43, 83

Why are those the prime factors of the number 401,441,120?

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 401,441,120

401,441,120
Factor Arrows
2200,720,560
Factor Arrows
2100,360,280
Factor Arrows
250,180,140
Factor Arrows
225,090,070
Factor Arrows
212,545,035
Factor Arrows
52,509,007
Factor Arrows
19132,053
Factor Arrows
373,569
Factor Arrows
4383

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, 19, 37, 43, 83

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 19 x 37 x 43 x 83 = 401,441,120

This can also be written as 25 x 51 x 191 x 371 x 431 x 831 = 401,441,120

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


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