Divisors of 3990: All 32 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 3990

The number 3990 has 32 divisors:

1,  2,  3,  5,  6,  7,  10,  14,  15,  19,  21,  30,  35,  38,  42,  57,  70,  95,  105,  114,  133,  190,  210,  266,  285,  399,  570,  665,  798,  1330,  1995,  3990

Divisor Pairs of 3990

Each pair multiplies to 3990:

Number of Divisors

The number 3990 has 32 divisors, written as τ(3990) = 32 in number theory.

Sum of Divisors

σ(3990) = 1 + 2 + 3 + 5 + 6 + 7 + 10 + 14 + 15 + 19 + 21 + 30 + 35 + 38 + 42 + 57 + 70 + 95 + 105 + 114 + 133 + 190 + 210 + 266 + 285 + 399 + 570 + 665 + 798 + 1330 + 1995 + 3990 = 11520

Prime Factorization of 3990

See the full prime factorization calculator →

Properties of 3990

• 3990 is composite.
• 3990 is not a perfect square.
• Number of divisors: 32.
• Sum of divisors: 11520.

Common Divisors with Another Number?

Looking for the divisors that 3990 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 3990

An efficient way to find divisors uses the complementary pair trick: check each integer i from 1 to √3990 ≈ 63.17. If i divides 3990, then both i and 3990/i are divisors.

1. 1 divides 3990 (3990 ÷ 1 = 3990) → pair (1, 3990)
2. 2 divides 3990 (3990 ÷ 2 = 1995) → pair (2, 1995)
3. 3 divides 3990 (3990 ÷ 3 = 1330) → pair (3, 1330)
4. 5 divides 3990 (3990 ÷ 5 = 798) → pair (5, 798)
5. 6 divides 3990 (3990 ÷ 6 = 665) → pair (6, 665)
6. 7 divides 3990 (3990 ÷ 7 = 570) → pair (7, 570)
7. 10 divides 3990 (3990 ÷ 10 = 399) → pair (10, 399)
8. 14 divides 3990 (3990 ÷ 14 = 285) → pair (14, 285)
9. 15 divides 3990 (3990 ÷ 15 = 266) → pair (15, 266)
10. 19 divides 3990 (3990 ÷ 19 = 210) → pair (19, 210)
11. 21 divides 3990 (3990 ÷ 21 = 190) → pair (21, 190)
12. 30 divides 3990 (3990 ÷ 30 = 133) → pair (30, 133)
13. 35 divides 3990 (3990 ÷ 35 = 114) → pair (35, 114)
14. 38 divides 3990 (3990 ÷ 38 = 105) → pair (38, 105)
15. 42 divides 3990 (3990 ÷ 42 = 95) → pair (42, 95)
16. 57 divides 3990 (3990 ÷ 57 = 70) → pair (57, 70)
17. Collect all unique values: {1, 2, 3, 5, 6, 7, 10, 14, 15, 19, 21, 30, 35, 38, 42, 57, 70, 95, 105, 114, 133, 190, 210, 266, 285, 399, 570, 665, 798, 1330, 1995, 3990} — total 32 divisors.
18. Sum: 1 + 2 + 3 + 5 + 6 + 7 + 10 + 14 + 15 + 19 + 21 + 30 + 35 + 38 + 42 + 57 + 70 + 95 + 105 + 114 + 133 + 190 + 210 + 266 + 285 + 399 + 570 + 665 + 798 + 1330 + 1995 + 3990 = 11520.

Nearby Examples

Related Operations for 3990

• Multiples of 3990 — "outward" complement; M is a multiple of 3990 ⇔ 3990 is a divisor of M
• 3990 Prime Factorization — decompose into prime building blocks
• Find GCF of 3990 and another number
• Find LCM of 3990 and another number
• Is 3990 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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