Q: What are the prime factors of the number 420,154,252?

 A: 2, 7, 17, 283, 3119

Why are those the prime factors of the number 420,154,252?

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 420,154,252

420,154,252
Factor Arrows
2210,077,126
Factor Arrows
2105,038,563
Factor Arrows
715,005,509
Factor Arrows
17882,677
Factor Arrows
2833,119

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, 7, 17, 283, 3119

We can check our work by multiplying all of the prime factors together: 2 x 2 x 7 x 17 x 283 x 3,119 = 420,154,252

This can also be written as 22 x 71 x 171 x 2831 x 3,1191 = 420,154,252

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


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