Q: What are the prime factors of the number 845,477,472?

 A: 2, 3, 7, 1258151

Why are those the prime factors of the number 845,477,472?

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 845,477,472

845,477,472
Factor Arrows
2422,738,736
Factor Arrows
2211,369,368
Factor Arrows
2105,684,684
Factor Arrows
252,842,342
Factor Arrows
226,421,171
Factor Arrows
38,807,057
Factor Arrows
71,258,151

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, 7, 1258151

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 7 x 1,258,151 = 845,477,472

This can also be written as 25 x 31 x 71 x 1,258,1511 = 845,477,472

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


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