Factors of 828

828 has 18 factors: 1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 92, 138, 207, 276, 414 and 828. Its prime factorization is 2² × 3² × 23.

Factor pairs of 828

Factor×FactorProduct
1×828828
2×414828
3×276828
4×207828
6×138828
9×92828
12×69828
18×46828
23×36828

Negative pairs work too: (−1) × (−828), (−2) × (−414), … = 828.

Number of factors
18
Factor pairs
9
Sum of factors
2,184
Prime or composite
Composite
Even or odd
Even
Perfect square
No
Prime factorization 2² × 3² × 23

How to find the factors of 828

Test every whole number from 1 up to the square root of 828 (√828 ≈ 28.775). Each number that divides evenly gives you two factors at once: the divisor and the quotient.

  • 828 ÷ 1 = 828 — so 1 and 828 are factors
  • 828 ÷ 2 = 414 — so 2 and 414 are factors
  • 828 ÷ 3 = 276 — so 3 and 276 are factors
  • 828 ÷ 4 = 207 — so 4 and 207 are factors
  • 828 ÷ 5 = 165.6 — not a whole number
  • 828 ÷ 6 = 138 — so 6 and 138 are factors
  • 828 ÷ 7 = 118.286 — not a whole number
  • 828 ÷ 8 = 103.5 — not a whole number
  • 828 ÷ 9 = 92 — so 9 and 92 are factors
  • 828 ÷ 10 = 82.8 — not a whole number
  • 828 ÷ 11 = 75.273 — not a whole number
  • 828 ÷ 12 = 69 — so 12 and 69 are factors
  • 828 ÷ 13 = 63.692 — not a whole number
  • 828 ÷ 14 = 59.143 — not a whole number
  • 828 ÷ 15 = 55.2 — not a whole number
  • 828 ÷ 16 = 51.75 — not a whole number
  • 828 ÷ 17 = 48.706 — not a whole number
  • 828 ÷ 18 = 46 — so 18 and 46 are factors
  • 828 ÷ 19 = 43.579 — not a whole number
  • 828 ÷ 20 = 41.4 — not a whole number
  • 828 ÷ 21 = 39.429 — not a whole number
  • 828 ÷ 22 = 37.636 — not a whole number
  • 828 ÷ 23 = 36 — so 23 and 36 are factors
  • 828 ÷ 24 = 34.5 — not a whole number
  • 828 ÷ 25 = 33.12 — not a whole number
  • 828 ÷ 26 = 31.846 — not a whole number
  • 828 ÷ 27 = 30.667 — not a whole number
  • 828 ÷ 28 = 29.571 — not a whole number

Collecting both numbers from every successful division gives the complete list: 1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 92, 138, 207, 276, 414 and 828.

Prime factorization of 828

Divide by the smallest prime that fits, and keep going until the quotient is 1:

828 ÷ 2 = 414
414 ÷ 2 = 207
207 ÷ 3 = 69
69 ÷ 3 = 23
23 ÷ 23 = 1

The primes you divided by give 828 = 2² × 3² × 23. From the exponents you can also count the factors without listing them: (2 + 1) × (2 + 1) × (1 + 1) = 18.

Properties of 828

  • 828 is a composite number.
  • The sum of all its factors is 2,184; the sum of its proper factors (excluding 828) is 1,356, which makes it a abundant number (its proper factors add up to more than itself).
  • 828 is not a perfect square, so its factors pair up evenly.
  • Multiples of 828 include 1,656, 2,484, 3,312, 4,140 and so on.

Factors vs. multiples

Factors of 828 are the numbers that divide into it; multiples of 828 are the numbers it divides into. Every number has a limited set of factors but infinitely many multiples. To work with any other number, use the factors calculator, or find shared factors with the GCF calculator.

Frequently asked questions

What are the factors of 828?

The factors of 828 are 1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 92, 138, 207, 276, 414 and 828. Each of these divides 828 with no remainder.

How many factors does 828 have?

828 has 18 positive factors, which form 9 factor pairs. Counting negative factors as well doubles that to 36.

What is the prime factorization of 828?

828 = 2² × 3² × 23. Its distinct prime factors are 2, 3 and 23.

Is 828 a prime number?

No. 828 is composite because it has 18 factors, more than the two a prime number has.