Q: What are the prime factors of the number 53,221,964?

 A: 2, 19, 53, 73, 181

Why are those the prime factors of the number 53,221,964?

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 53,221,964

53,221,964
Factor Arrows
226,610,982
Factor Arrows
213,305,491
Factor Arrows
19700,289
Factor Arrows
5313,213
Factor Arrows
73181

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, 19, 53, 73, 181

We can check our work by multiplying all of the prime factors together: 2 x 2 x 19 x 53 x 73 x 181 = 53,221,964

This can also be written as 22 x 191 x 531 x 731 x 1811 = 53,221,964

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


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