Q: What are the prime factors of the number 47,312,640?

 A: 2, 3, 5, 37

Why are those the prime factors of the number 47,312,640?

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 47,312,640

47,312,640
Factor Arrows
223,656,320
Factor Arrows
211,828,160
Factor Arrows
25,914,080
Factor Arrows
22,957,040
Factor Arrows
21,478,520
Factor Arrows
2739,260
Factor Arrows
2369,630
Factor Arrows
2184,815
Factor Arrows
361,605
Factor Arrows
320,535
Factor Arrows
36,845
Factor Arrows
51,369
Factor Arrows
3737

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, 37

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 3 x 3 x 3 x 5 x 37 x 37 = 47,312,640

This can also be written as 28 x 33 x 51 x 372 = 47,312,640

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


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