Q: What are the prime factors of the number 164,217,312?

 A: 2, 3, 7, 81457

Why are those the prime factors of the number 164,217,312?

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 164,217,312

164,217,312
Factor Arrows
282,108,656
Factor Arrows
241,054,328
Factor Arrows
220,527,164
Factor Arrows
210,263,582
Factor Arrows
25,131,791
Factor Arrows
31,710,597
Factor Arrows
3570,199
Factor Arrows
781,457

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, 81457

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 7 x 81,457 = 164,217,312

This can also be written as 25 x 32 x 71 x 81,4571 = 164,217,312

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


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