Q: What are the prime factors of the number 83,238,400?

 A: 2, 5, 7, 929

Why are those the prime factors of the number 83,238,400?

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 83,238,400

83,238,400
Factor Arrows
241,619,200
Factor Arrows
220,809,600
Factor Arrows
210,404,800
Factor Arrows
25,202,400
Factor Arrows
22,601,200
Factor Arrows
21,300,600
Factor Arrows
2650,300
Factor Arrows
2325,150
Factor Arrows
2162,575
Factor Arrows
532,515
Factor Arrows
56,503
Factor Arrows
7929

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, 929

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 5 x 5 x 7 x 929 = 83,238,400

This can also be written as 29 x 52 x 71 x 9291 = 83,238,400

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


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