Q: What are the prime factors of the number 402,365,600?

 A: 2, 5, 7, 13, 5527

Why are those the prime factors of the number 402,365,600?

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 402,365,600

402,365,600
Factor Arrows
2201,182,800
Factor Arrows
2100,591,400
Factor Arrows
250,295,700
Factor Arrows
225,147,850
Factor Arrows
212,573,925
Factor Arrows
52,514,785
Factor Arrows
5502,957
Factor Arrows
771,851
Factor Arrows
135,527

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, 13, 5527

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 5 x 7 x 13 x 5,527 = 402,365,600

This can also be written as 25 x 52 x 71 x 131 x 5,5271 = 402,365,600

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


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