Q: What are the prime factors of the number 66,026,240?

 A: 2, 5, 7, 7369

Why are those the prime factors of the number 66,026,240?

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 66,026,240

66,026,240
Factor Arrows
233,013,120
Factor Arrows
216,506,560
Factor Arrows
28,253,280
Factor Arrows
24,126,640
Factor Arrows
22,063,320
Factor Arrows
21,031,660
Factor Arrows
2515,830
Factor Arrows
2257,915
Factor Arrows
551,583
Factor Arrows
77,369

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, 5, 7, 7369

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 5 x 7 x 7,369 = 66,026,240

This can also be written as 28 x 51 x 71 x 7,3691 = 66,026,240

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


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