Q: What are the prime factors of the number 212,154,240?

 A: 2, 3, 5, 47, 2351

Why are those the prime factors of the number 212,154,240?

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 212,154,240

212,154,240
Factor Arrows
2106,077,120
Factor Arrows
253,038,560
Factor Arrows
226,519,280
Factor Arrows
213,259,640
Factor Arrows
26,629,820
Factor Arrows
23,314,910
Factor Arrows
21,657,455
Factor Arrows
3552,485
Factor Arrows
5110,497
Factor Arrows
472,351

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, 47, 2351

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 3 x 5 x 47 x 2,351 = 212,154,240

This can also be written as 27 x 31 x 51 x 471 x 2,3511 = 212,154,240

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


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