Q: What are the prime factors of the number 1,621,632?

 A: 2, 3, 41, 103

Why are those the prime factors of the number 1,621,632?

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 1,621,632

1,621,632
Factor Arrows
2810,816
Factor Arrows
2405,408
Factor Arrows
2202,704
Factor Arrows
2101,352
Factor Arrows
250,676
Factor Arrows
225,338
Factor Arrows
212,669
Factor Arrows
34,223
Factor Arrows
41103

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, 41, 103

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 41 x 103 = 1,621,632

This can also be written as 27 x 31 x 411 x 1031 = 1,621,632

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


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