Divisors of 396: All 18 Factors

Divisors (Factors) Calculator

Use the calculator above to find all divisors (also called factors) of any positive integer up to 4,782,969. Beyond the divisor list, this tool also shows divisor pairs, the sum and count of divisors, prime factorization, and number properties (prime, perfect square, perfect number).

All Divisors of 396

The number 396 has 18 divisors:

1,  2,  3,  4,  6,  9,  11,  12,  18,  22,  33,  36,  44,  66,  99,  132,  198,  396

Divisor Pairs of 396

Each pair multiplies to 396:

Number of Divisors

The number 396 has 18 divisors, written as τ(396) = 18 in number theory.

Sum of Divisors

σ(396) = 1 + 2 + 3 + 4 + 6 + 9 + 11 + 12 + 18 + 22 + 33 + 36 + 44 + 66 + 99 + 132 + 198 + 396 = 1092

Prime Factorization of 396

See the full prime factorization calculator →

Properties of 396

• 396 is composite.
• 396 is not a perfect square.
• Number of divisors: 18.
• Sum of divisors: 1092.

Common Divisors with Another Number?

Looking for the divisors that 396 shares with another number? Use our Greatest Common Factor (GCF) calculator — it finds all common divisors and the largest one.

Step-by-Step: How to Find the Divisors of 396

An efficient way to find divisors uses the complementary pair trick: check each integer i from 1 to √396 ≈ 19.90. If i divides 396, then both i and 396/i are divisors.

1. 1 divides 396 (396 ÷ 1 = 396) → pair (1, 396)
2. 2 divides 396 (396 ÷ 2 = 198) → pair (2, 198)
3. 3 divides 396 (396 ÷ 3 = 132) → pair (3, 132)
4. 4 divides 396 (396 ÷ 4 = 99) → pair (4, 99)
5. 6 divides 396 (396 ÷ 6 = 66) → pair (6, 66)
6. 9 divides 396 (396 ÷ 9 = 44) → pair (9, 44)
7. 11 divides 396 (396 ÷ 11 = 36) → pair (11, 36)
8. 12 divides 396 (396 ÷ 12 = 33) → pair (12, 33)
9. 18 divides 396 (396 ÷ 18 = 22) → pair (18, 22)
10. Collect all unique values: {1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 33, 36, 44, 66, 99, 132, 198, 396} — total 18 divisors.
11. Sum: 1 + 2 + 3 + 4 + 6 + 9 + 11 + 12 + 18 + 22 + 33 + 36 + 44 + 66 + 99 + 132 + 198 + 396 = 1092.

Nearby Examples

Related Operations for 396

• Multiples of 396 — "outward" complement; M is a multiple of 396 ⇔ 396 is a divisor of M
• 396 Prime Factorization — decompose into prime building blocks
• Find GCF of 396 and another number
• Find LCM of 396 and another number
• Is 396 a perfect square? (odd divisor count ⇔ yes)

See also our tables of divisors:

• Table of all divisors from 1 to 100
• Table of all divisors from 1 to 500
• Table of all divisors from 1 to 1,000
• Table of all divisors from 1 to 10,000

What Is a Divisor?

A divisor (also called a factor) of a positive integer n is any positive integer d such that n ÷ d has no remainder. In other words, d divides n evenly.

Every positive integer n has at least two divisors: 1 and n itself (with 1 being the trivial case of having only itself). Numbers with exactly 2 divisors are prime; numbers with 3 or more divisors are composite.

Why use this calculator? Beyond just listing divisors, this tool computes the sum σ(n), the count τ(n), prime factorization, divisor pairs (useful for visual learners and factoring problems), and detects whether n is a prime, a perfect square, or a perfect number.

References

• [1] Divisor (Wikipedia)
• [2] Divisor function (Wikipedia)
• [3] Divisor (Wolfram MathWorld)

Divisors Calculation Examples

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