Q: What are the prime factors of the number 243,211,400?

 A: 2, 5, 19, 29, 2207

Why are those the prime factors of the number 243,211,400?

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 243,211,400

243,211,400
Factor Arrows
2121,605,700
Factor Arrows
260,802,850
Factor Arrows
230,401,425
Factor Arrows
56,080,285
Factor Arrows
51,216,057
Factor Arrows
1964,003
Factor Arrows
292,207

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, 19, 29, 2207

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 5 x 19 x 29 x 2,207 = 243,211,400

This can also be written as 23 x 52 x 191 x 291 x 2,2071 = 243,211,400

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


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