Q: What are the prime factors of the number 1,544,480?

 A: 2, 5, 7, 197

Why are those the prime factors of the number 1,544,480?

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 1,544,480

1,544,480
Factor Arrows
2772,240
Factor Arrows
2386,120
Factor Arrows
2193,060
Factor Arrows
296,530
Factor Arrows
248,265
Factor Arrows
59,653
Factor Arrows
71,379
Factor Arrows
7197

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, 7, 197

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 7 x 7 x 197 = 1,544,480

This can also be written as 25 x 51 x 72 x 1971 = 1,544,480

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


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