Q: What are the prime factors of the number 243,556,352?

 A: 2, 13, 2287

Why are those the prime factors of the number 243,556,352?

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 243,556,352

243,556,352
Factor Arrows
2121,778,176
Factor Arrows
260,889,088
Factor Arrows
230,444,544
Factor Arrows
215,222,272
Factor Arrows
27,611,136
Factor Arrows
23,805,568
Factor Arrows
21,902,784
Factor Arrows
2951,392
Factor Arrows
2475,696
Factor Arrows
2237,848
Factor Arrows
2118,924
Factor Arrows
259,462
Factor Arrows
229,731
Factor Arrows
132,287

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, 13, 2287

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 2 x 2 x 2 x 2 x 13 x 2,287 = 243,556,352

This can also be written as 213 x 131 x 2,2871 = 243,556,352

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


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