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Number Theory Calculators

Factors Calculator

List every factor (divisor) of a number, factor pairs, the count and sum of divisors, and whether the number is prime.

Enter values

Results update as you type.

Result

Factors of 84

1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84

Number of factors
12
Sum of factors
224
Prime?
No

Factor pairs

FactorPairProduct
18484
24284
32884
42184
61484
71284

About the Factors Calculator

List every factor (divisor) of a number, factor pairs, the count and sum of divisors, and whether the number is prime.

Also known as: divisor calculator, factors of a number, find all factors, factor pairs, divisors.

How to use this calculator

  1. Enter whole number.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

d is a factor of n if n ÷ d leaves no remainder

Worked example

Using the values pre-filled in the calculator above:

  • Whole number = 84

the calculator returns:

  • Factors of 84: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
  • Number of factors: 12
  • Sum of factors: 224
  • Prime?: No