Q: What are the prime factors of the number 413,421,400?

 A: 2, 5, 7, 47, 61, 103

Why are those the prime factors of the number 413,421,400?

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 413,421,400

413,421,400
Factor Arrows
2206,710,700
Factor Arrows
2103,355,350
Factor Arrows
251,677,675
Factor Arrows
510,335,535
Factor Arrows
52,067,107
Factor Arrows
7295,301
Factor Arrows
476,283
Factor Arrows
61103

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, 47, 61, 103

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 5 x 7 x 47 x 61 x 103 = 413,421,400

This can also be written as 23 x 52 x 71 x 471 x 611 x 1031 = 413,421,400

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


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