Q: What are the prime factors of the number 261,063,378?

 A: 2, 3, 461, 10487

Why are those the prime factors of the number 261,063,378?

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 261,063,378

261,063,378
Factor Arrows
2130,531,689
Factor Arrows
343,510,563
Factor Arrows
314,503,521
Factor Arrows
34,834,507
Factor Arrows
46110,487

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, 461, 10487

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 461 x 10,487 = 261,063,378

This can also be written as 21 x 33 x 4611 x 10,4871 = 261,063,378

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


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