Q: What are the prime factors of the number 403,550,368?

 A: 2, 13, 71, 1051

Why are those the prime factors of the number 403,550,368?

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 403,550,368

403,550,368
Factor Arrows
2201,775,184
Factor Arrows
2100,887,592
Factor Arrows
250,443,796
Factor Arrows
225,221,898
Factor Arrows
212,610,949
Factor Arrows
13970,073
Factor Arrows
1374,621
Factor Arrows
711,051

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, 71, 1051

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 13 x 13 x 71 x 1,051 = 403,550,368

This can also be written as 25 x 132 x 711 x 1,0511 = 403,550,368

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


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