Q: What are the prime factors of the number 70,842,400?

 A: 2, 5, 17, 5209

Why are those the prime factors of the number 70,842,400?

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 70,842,400

70,842,400
Factor Arrows
235,421,200
Factor Arrows
217,710,600
Factor Arrows
28,855,300
Factor Arrows
24,427,650
Factor Arrows
22,213,825
Factor Arrows
5442,765
Factor Arrows
588,553
Factor Arrows
175,209

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, 17, 5209

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 5 x 17 x 5,209 = 70,842,400

This can also be written as 25 x 52 x 171 x 5,2091 = 70,842,400

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


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