Q: What are the prime factors of the number 39,091,200?

 A: 2, 3, 5, 509

Why are those the prime factors of the number 39,091,200?

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 39,091,200

39,091,200
Factor Arrows
219,545,600
Factor Arrows
29,772,800
Factor Arrows
24,886,400
Factor Arrows
22,443,200
Factor Arrows
21,221,600
Factor Arrows
2610,800
Factor Arrows
2305,400
Factor Arrows
2152,700
Factor Arrows
276,350
Factor Arrows
238,175
Factor Arrows
312,725
Factor Arrows
52,545
Factor Arrows
5509

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, 509

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 2 x 2 x 3 x 5 x 5 x 509 = 39,091,200

This can also be written as 210 x 31 x 52 x 5091 = 39,091,200

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


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