Factors of 842

842 has 4 factors: 1, 2, 421 and 842. Its prime factorization is 2 × 421.

Factor pairs of 842

Factor×FactorProduct
1×842842
2×421842

Negative pairs work too: (−1) × (−842), (−2) × (−421) = 842.

Number of factors
4
Factor pairs
2
Sum of factors
1,266
Prime or composite
Composite
Even or odd
Even
Perfect square
No
Prime factorization 2 × 421

How to find the factors of 842

Test every whole number from 1 up to the square root of 842 (√842 ≈ 29.017). Each number that divides evenly gives you two factors at once: the divisor and the quotient.

  • 842 ÷ 1 = 842 — so 1 and 842 are factors
  • 842 ÷ 2 = 421 — so 2 and 421 are factors
  • 842 ÷ 3 = 280.667 — not a whole number
  • 842 ÷ 4 = 210.5 — not a whole number
  • 842 ÷ 5 = 168.4 — not a whole number
  • 842 ÷ 6 = 140.333 — not a whole number
  • 842 ÷ 7 = 120.286 — not a whole number
  • 842 ÷ 8 = 105.25 — not a whole number
  • 842 ÷ 9 = 93.556 — not a whole number
  • 842 ÷ 10 = 84.2 — not a whole number
  • 842 ÷ 11 = 76.545 — not a whole number
  • 842 ÷ 12 = 70.167 — not a whole number
  • 842 ÷ 13 = 64.769 — not a whole number
  • 842 ÷ 14 = 60.143 — not a whole number
  • 842 ÷ 15 = 56.133 — not a whole number
  • 842 ÷ 16 = 52.625 — not a whole number
  • 842 ÷ 17 = 49.529 — not a whole number
  • 842 ÷ 18 = 46.778 — not a whole number
  • 842 ÷ 19 = 44.316 — not a whole number
  • 842 ÷ 20 = 42.1 — not a whole number
  • 842 ÷ 21 = 40.095 — not a whole number
  • 842 ÷ 22 = 38.273 — not a whole number
  • 842 ÷ 23 = 36.609 — not a whole number
  • 842 ÷ 24 = 35.083 — not a whole number
  • 842 ÷ 25 = 33.68 — not a whole number
  • 842 ÷ 26 = 32.385 — not a whole number
  • 842 ÷ 27 = 31.185 — not a whole number
  • 842 ÷ 28 = 30.071 — not a whole number
  • 842 ÷ 29 = 29.034 — not a whole number

Collecting both numbers from every successful division gives the complete list: 1, 2, 421 and 842.

Prime factorization of 842

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

842 ÷ 2 = 421
421 ÷ 421 = 1

The primes you divided by give 842 = 2 × 421. From the exponents you can also count the factors without listing them: (1 + 1) × (1 + 1) = 4.

Properties of 842

  • 842 is a composite number.
  • The sum of all its factors is 1,266; the sum of its proper factors (excluding 842) is 424, which makes it a deficient number (its proper factors add up to less than itself).
  • 842 is not a perfect square, so its factors pair up evenly.
  • Multiples of 842 include 1,684, 2,526, 3,368, 4,210 and so on.

Factors vs. multiples

Factors of 842 are the numbers that divide into it; multiples of 842 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 842?

The factors of 842 are 1, 2, 421 and 842. Each of these divides 842 with no remainder.

How many factors does 842 have?

842 has 4 positive factors, which form 2 factor pairs. Counting negative factors as well doubles that to 8.

What is the prime factorization of 842?

842 = 2 × 421. Its distinct prime factors are 2 and 421.

Is 842 a prime number?

No. 842 is composite because it has 4 factors, more than the two a prime number has.