Q: What are the prime factors of the number 64,397,632?

 A: 2, 13, 17, 29, 157

Why are those the prime factors of the number 64,397,632?

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 64,397,632

64,397,632
Factor Arrows
232,198,816
Factor Arrows
216,099,408
Factor Arrows
28,049,704
Factor Arrows
24,024,852
Factor Arrows
22,012,426
Factor Arrows
21,006,213
Factor Arrows
1377,401
Factor Arrows
174,553
Factor Arrows
29157

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, 13, 17, 29, 157

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 13 x 17 x 29 x 157 = 64,397,632

This can also be written as 26 x 131 x 171 x 291 x 1571 = 64,397,632

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


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