Q: What are the prime factors of the number 70,377,440?

 A: 2, 5, 7, 31, 2027

Why are those the prime factors of the number 70,377,440?

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 70,377,440

70,377,440
Factor Arrows
235,188,720
Factor Arrows
217,594,360
Factor Arrows
28,797,180
Factor Arrows
24,398,590
Factor Arrows
22,199,295
Factor Arrows
5439,859
Factor Arrows
762,837
Factor Arrows
312,027

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, 31, 2027

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 7 x 31 x 2,027 = 70,377,440

This can also be written as 25 x 51 x 71 x 311 x 2,0271 = 70,377,440

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


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