Best Answer

Choose a factor pair of 640 and then factor pairs of each resulting number that is not prime until you have reduced 640 to prime numbers.

640

10 x 64

2x5 x 8x8

_ _ 2x4 2x4

_ _ _ 2x2 _ 2x2

So, the prime factorization of 640 is 2 x 5 x 2 x 2 x 2 x 2 x 2 x 2, which is 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5 when reordered in numerical order. It can also be written in index form (in other words, using exponents) 27 x 5.

Q: What is a factor tree of 640?

Write your answer...

Submit

Still have questions?

Continue Learning about Movies & Television

The GCF is 128.

83 is prime. No tree.

61 is already prime. It doesn't need a tree.

When the bottom branch consists entirely of prime numbers.

The purpose of a factor tree is to divide a number into prime factors. 1 is not a prime number.

Related questions

640 320,2 160,2,2 80,2,2,2 40,2,2,2,2 20,2,2,2,2,2 10,2,2,2,2,2,2 5,2,2,2,2,2,2,2

16 cause the highest factor for both 128 and 640

640: Prime factorization: (2^7)(5) Every factor: 1,2,4,5,8,10,16,20,32,40,64,80,128,160,320,640

The greatest common factor (GCF) of 640 and 256 is 128.

The GCF is 160.

The GCF is 320.

The GCF is 128.

The GCF is 20.

IT IS PRIME there is no factor tree

Factor tree of 204

factor tree of 216

The factor tree of 50:5025,25,5,25025,25,5,2