Q: What are the prime factors of the number 243,404,352?

 A: 2, 3, 37, 47

Why are those the prime factors of the number 243,404,352?

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 243,404,352

243,404,352
Factor Arrows
2121,702,176
Factor Arrows
260,851,088
Factor Arrows
230,425,544
Factor Arrows
215,212,772
Factor Arrows
27,606,386
Factor Arrows
23,803,193
Factor Arrows
31,267,731
Factor Arrows
3422,577
Factor Arrows
3140,859
Factor Arrows
346,953
Factor Arrows
315,651
Factor Arrows
35,217
Factor Arrows
31,739
Factor Arrows
3747

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, 37, 47

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 3 x 3 x 3 x 3 x 3 x 3 x 3 x 37 x 47 = 243,404,352

This can also be written as 26 x 37 x 371 x 471 = 243,404,352

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


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