Q: What are the prime factors of the number 403,225,100?

 A: 2, 5, 139, 29009

Why are those the prime factors of the number 403,225,100?

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 403,225,100

403,225,100
Factor Arrows
2201,612,550
Factor Arrows
2100,806,275
Factor Arrows
520,161,255
Factor Arrows
54,032,251
Factor Arrows
13929,009

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, 139, 29009

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 5 x 139 x 29,009 = 403,225,100

This can also be written as 22 x 52 x 1391 x 29,0091 = 403,225,100

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


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