Q: What is the total or count of factors of the number 638,647,464?

A: 128

How do I find the total factors of the number 638,647,464?

Step 1

Find the prime factorization of the number 638,647,464.

Use a factor tree to assist with solving. Take a look at our prime factorization page for additional help.

Factor Tree

	638,647,464

2		319,323,732

	2		159,661,866

		2		79,830,933

			3		26,610,311

				7		3,801,473

					13		292,421

						191		1,531

The prime factorization in exponential form is: 2³ x 3¹ x 7¹ x 13¹ x 191¹ x 1,531¹

Step 2

Setup the equation for determining the number of factors or divisors. The equation is:

d(n) = (a + 1)(b + 1)(c + 1)(d + 1)(e + 1)(f + 1)

Where d(n) is equal to the number of divisors of the number and a, b, etc. are equal to the exponents of the prime factorization.

Now substitute the letters in the equation with the the exponents of your prime factorization and then solve to calculate the total number of divisors.

638,647,464 = 2³ x 3¹ x 7¹ x 13¹ x 191¹ x 1,531¹

d(n) = (a + 1)(b + 1)(c + 1)(d + 1)(e + 1)(f + 1)

d(638647464) = (3 + 1)(1 + 1)(1 + 1)(1 + 1)(1 + 1)(1 + 1)

d(638647464) = (4)(2)(2)(2)(2)(2)

d(638647464) = 128

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Take a look at the factors page to see the factors of 638,647,464 and how to find them.

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