Q: What are the prime factors of the number 153,445,500?

 A: 2, 3, 5, 13, 43, 61

Why are those the prime factors of the number 153,445,500?

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 153,445,500

153,445,500
Factor Arrows
276,722,750
Factor Arrows
238,361,375
Factor Arrows
312,787,125
Factor Arrows
34,262,375
Factor Arrows
5852,475
Factor Arrows
5170,495
Factor Arrows
534,099
Factor Arrows
132,623
Factor Arrows
4361

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, 3, 5, 13, 43, 61

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 5 x 5 x 13 x 43 x 61 = 153,445,500

This can also be written as 22 x 32 x 53 x 131 x 431 x 611 = 153,445,500

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


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