Q: What are the prime factors of the number 64,664,640?

 A: 2, 3, 5, 22453

Why are those the prime factors of the number 64,664,640?

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 64,664,640

64,664,640
Factor Arrows
232,332,320
Factor Arrows
216,166,160
Factor Arrows
28,083,080
Factor Arrows
24,041,540
Factor Arrows
22,020,770
Factor Arrows
21,010,385
Factor Arrows
3336,795
Factor Arrows
3112,265
Factor Arrows
522,453

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, 5, 22453

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 3 x 3 x 5 x 22,453 = 64,664,640

This can also be written as 26 x 32 x 51 x 22,4531 = 64,664,640

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


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