Q: What are the prime factors of the number 1,556,400?

 A: 2, 3, 5, 1297

Why are those the prime factors of the number 1,556,400?

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 1,556,400

1,556,400
Factor Arrows
2778,200
Factor Arrows
2389,100
Factor Arrows
2194,550
Factor Arrows
297,275
Factor Arrows
332,425
Factor Arrows
56,485
Factor Arrows
51,297

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, 1297

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 5 x 1,297 = 1,556,400

This can also be written as 24 x 31 x 52 x 1,2971 = 1,556,400

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


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