Q: What are the prime factors of the number 251,043,100?

 A: 2, 5, 7, 11, 32603

Why are those the prime factors of the number 251,043,100?

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 251,043,100

251,043,100
Factor Arrows
2125,521,550
Factor Arrows
262,760,775
Factor Arrows
512,552,155
Factor Arrows
52,510,431
Factor Arrows
7358,633
Factor Arrows
1132,603

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, 11, 32603

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 5 x 7 x 11 x 32,603 = 251,043,100

This can also be written as 22 x 52 x 71 x 111 x 32,6031 = 251,043,100

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


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