Q: What are the prime factors of the number 47,320,400?

 A: 2, 5, 281, 421

Why are those the prime factors of the number 47,320,400?

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 47,320,400

47,320,400
Factor Arrows
223,660,200
Factor Arrows
211,830,100
Factor Arrows
25,915,050
Factor Arrows
22,957,525
Factor Arrows
5591,505
Factor Arrows
5118,301
Factor Arrows
281421

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, 281, 421

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 5 x 281 x 421 = 47,320,400

This can also be written as 24 x 52 x 2811 x 4211 = 47,320,400

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


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