Q: What are the prime factors of the number 4,709,376?

 A: 2, 3, 7, 73

Why are those the prime factors of the number 4,709,376?

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 4,709,376

4,709,376
Factor Arrows
22,354,688
Factor Arrows
21,177,344
Factor Arrows
2588,672
Factor Arrows
2294,336
Factor Arrows
2147,168
Factor Arrows
273,584
Factor Arrows
236,792
Factor Arrows
218,396
Factor Arrows
29,198
Factor Arrows
24,599
Factor Arrows
31,533
Factor Arrows
3511
Factor Arrows
773

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, 73

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 2 x 2 x 3 x 3 x 7 x 73 = 4,709,376

This can also be written as 210 x 32 x 71 x 731 = 4,709,376

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


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