Q: What are the prime factors of the number 670,472,320?

 A: 2, 5, 7, 103, 1453

Why are those the prime factors of the number 670,472,320?

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 670,472,320

670,472,320
Factor Arrows
2335,236,160
Factor Arrows
2167,618,080
Factor Arrows
283,809,040
Factor Arrows
241,904,520
Factor Arrows
220,952,260
Factor Arrows
210,476,130
Factor Arrows
25,238,065
Factor Arrows
51,047,613
Factor Arrows
7149,659
Factor Arrows
1031,453

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, 5, 7, 103, 1453

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 5 x 7 x 103 x 1,453 = 670,472,320

This can also be written as 27 x 51 x 71 x 1031 x 1,4531 = 670,472,320

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


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