Q: What are the prime factors of the number 1,943,400?

 A: 2, 3, 5, 41, 79

Why are those the prime factors of the number 1,943,400?

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 1,943,400

1,943,400
Factor Arrows
2971,700
Factor Arrows
2485,850
Factor Arrows
2242,925
Factor Arrows
380,975
Factor Arrows
516,195
Factor Arrows
53,239
Factor Arrows
4179

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, 41, 79

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 5 x 41 x 79 = 1,943,400

This can also be written as 23 x 31 x 52 x 411 x 791 = 1,943,400

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


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