Q: What are the prime factors of the number 402,262,016?

 A: 2, 13, 29, 521

Why are those the prime factors of the number 402,262,016?

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 402,262,016

402,262,016
Factor Arrows
2201,131,008
Factor Arrows
2100,565,504
Factor Arrows
250,282,752
Factor Arrows
225,141,376
Factor Arrows
212,570,688
Factor Arrows
26,285,344
Factor Arrows
23,142,672
Factor Arrows
21,571,336
Factor Arrows
2785,668
Factor Arrows
2392,834
Factor Arrows
2196,417
Factor Arrows
1315,109
Factor Arrows
29521

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, 29, 521

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 2 x 2 x 2 x 2 x 2 x 13 x 29 x 521 = 402,262,016

This can also be written as 211 x 131 x 291 x 5211 = 402,262,016

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


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