Q: What are the prime factors of the number 4,154,240?

 A: 2, 5, 6491

Why are those the prime factors of the number 4,154,240?

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 4,154,240

4,154,240
Factor Arrows
22,077,120
Factor Arrows
21,038,560
Factor Arrows
2519,280
Factor Arrows
2259,640
Factor Arrows
2129,820
Factor Arrows
264,910
Factor Arrows
232,455
Factor Arrows
56,491

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, 6491

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 5 x 6,491 = 4,154,240

This can also be written as 27 x 51 x 6,4911 = 4,154,240

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


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