Q: What are the prime factors of the number 1,943,552?

 A: 2, 13, 73

Why are those the prime factors of the number 1,943,552?

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 1,943,552

1,943,552
Factor Arrows
2971,776
Factor Arrows
2485,888
Factor Arrows
2242,944
Factor Arrows
2121,472
Factor Arrows
260,736
Factor Arrows
230,368
Factor Arrows
215,184
Factor Arrows
27,592
Factor Arrows
23,796
Factor Arrows
21,898
Factor Arrows
2949
Factor Arrows
1373

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, 13, 73

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 2 x 2 x 2 x 2 x 13 x 73 = 1,943,552

This can also be written as 211 x 131 x 731 = 1,943,552

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


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