Q: What are the prime factors of the number 16,430,400?

 A: 2, 3, 5, 7, 163

Why are those the prime factors of the number 16,430,400?

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 16,430,400

16,430,400
Factor Arrows
28,215,200
Factor Arrows
24,107,600
Factor Arrows
22,053,800
Factor Arrows
21,026,900
Factor Arrows
2513,450
Factor Arrows
2256,725
Factor Arrows
385,575
Factor Arrows
328,525
Factor Arrows
55,705
Factor Arrows
51,141
Factor Arrows
7163

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, 7, 163

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 3 x 3 x 5 x 5 x 7 x 163 = 16,430,400

This can also be written as 26 x 32 x 52 x 71 x 1631 = 16,430,400

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


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