Q: What are the prime factors of the number 47,142,400?

 A: 2, 5, 29, 127

Why are those the prime factors of the number 47,142,400?

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 47,142,400

47,142,400
Factor Arrows
223,571,200
Factor Arrows
211,785,600
Factor Arrows
25,892,800
Factor Arrows
22,946,400
Factor Arrows
21,473,200
Factor Arrows
2736,600
Factor Arrows
2368,300
Factor Arrows
2184,150
Factor Arrows
292,075
Factor Arrows
518,415
Factor Arrows
53,683
Factor Arrows
29127

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, 29, 127

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 29 x 127 = 47,142,400

This can also be written as 29 x 52 x 291 x 1271 = 47,142,400

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


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