Q: What is the total or count of factors of the number 3,920?

 A: 30

How do I find the total factors of the number 3,920?

Step 1

Find the prime factorization of the number 3,920.

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

Factor Tree
3,920
Factor Arrows
21,960
Factor Arrows
2980
Factor Arrows
2490
Factor Arrows
2245
Factor Arrows
549
Factor Arrows
77

The prime factorization in exponential form is: 24 x 51 x 72

Step 2

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

d(n) = (a + 1)(b + 1)(c + 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.

3,920 = 24 x 51 x 72
Down Arrow
d(n) = (a + 1)(b + 1)(c + 1)
Down Arrow
d(3920) = (4 + 1)(1 + 1)(2 + 1)
Down Arrow
d(3920) = (5)(2)(3)
Down Arrow
d(3920) = 30

More numbers for you to try

Take a look at the factors page to see the factors of 3,920 and how to find them.

Try the factor calculator.

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