Q: What are the prime factors of the number 163,217,664?

 A: 2, 3, 70841

Why are those the prime factors of the number 163,217,664?

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 163,217,664

163,217,664
Factor Arrows
281,608,832
Factor Arrows
240,804,416
Factor Arrows
220,402,208
Factor Arrows
210,201,104
Factor Arrows
25,100,552
Factor Arrows
22,550,276
Factor Arrows
21,275,138
Factor Arrows
2637,569
Factor Arrows
3212,523
Factor Arrows
370,841

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, 70841

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 3 x 3 x 70,841 = 163,217,664

This can also be written as 28 x 32 x 70,8411 = 163,217,664

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


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