Q: What are the prime factors of the number 402,366,450?

 A: 2, 3, 5, 211, 12713

Why are those the prime factors of the number 402,366,450?

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 402,366,450

402,366,450
Factor Arrows
2201,183,225
Factor Arrows
367,061,075
Factor Arrows
513,412,215
Factor Arrows
52,682,443
Factor Arrows
21112,713

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, 211, 12713

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 5 x 211 x 12,713 = 402,366,450

This can also be written as 21 x 31 x 52 x 2111 x 12,7131 = 402,366,450

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


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