Factors of 491

How to find the factors of 491

Test every whole number from 1 up to the square root of 491 (√491 ≈ 22.159). Each number that divides evenly gives you two factors at once: the divisor and the quotient.

• 491 ÷ 1 = 491 — so 1 and 491 are factors
• 491 ÷ 2 = 245.5 — not a whole number
• 491 ÷ 3 = 163.667 — not a whole number
• 491 ÷ 4 = 122.75 — not a whole number
• 491 ÷ 5 = 98.2 — not a whole number
• 491 ÷ 6 = 81.833 — not a whole number
• 491 ÷ 7 = 70.143 — not a whole number
• 491 ÷ 8 = 61.375 — not a whole number
• 491 ÷ 9 = 54.556 — not a whole number
• 491 ÷ 10 = 49.1 — not a whole number
• 491 ÷ 11 = 44.636 — not a whole number
• 491 ÷ 12 = 40.917 — not a whole number
• 491 ÷ 13 = 37.769 — not a whole number
• 491 ÷ 14 = 35.071 — not a whole number
• 491 ÷ 15 = 32.733 — not a whole number
• 491 ÷ 16 = 30.688 — not a whole number
• 491 ÷ 17 = 28.882 — not a whole number
• 491 ÷ 18 = 27.278 — not a whole number
• 491 ÷ 19 = 25.842 — not a whole number
• 491 ÷ 20 = 24.55 — not a whole number
• 491 ÷ 21 = 23.381 — not a whole number
• 491 ÷ 22 = 22.318 — not a whole number

Collecting both numbers from every successful division gives the complete list: 1 and 491.

Prime factorization of 491

491 is a prime number, so it cannot be broken down any further. Its prime factorization is simply 491.

Properties of 491

• 491 is a prime number.
• The sum of all its factors is 492; the sum of its proper factors (excluding 491) is 1, which makes it a deficient number (its proper factors add up to less than itself).
• 491 is not a perfect square, so its factors pair up evenly.
• Multiples of 491 include 982, 1,473, 1,964, 2,455 and so on.

Factors vs. multiples

Factors of 491 are the numbers that divide into it; multiples of 491 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.