Divisors of 1600: All 21 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 1600

The number 1600 has 21 divisors:

1,  2,  4,  5,  8,  10,  16,  20,  25,  32,  40,  50,  64,  80,  100,  160,  200,  320,  400,  800,  1600

Divisor Pairs of 1600

Each pair multiplies to 1600:

Note: the last pair has identical factors (40 × 40) because 1600 is a perfect square.

Number of Divisors

The number 1600 has 21 divisors, written as τ(1600) = 21 in number theory.

⚡ Notice: 1600 has an odd number of divisors — this means 1600 is a perfect square (√1600 = 40).

Sum of Divisors

σ(1600) = 1 + 2 + 4 + 5 + 8 + 10 + 16 + 20 + 25 + 32 + 40 + 50 + 64 + 80 + 100 + 160 + 200 + 320 + 400 + 800 + 1600 = 3937

Prime Factorization of 1600

See the full prime factorization calculator →

Properties of 1600

• 1600 is composite.
• 1600 is a perfect square (√1600 = 40).
• Number of divisors: 21.
• Sum of divisors: 3937.

Common Divisors with Another Number?

Looking for the divisors that 1600 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 1600

An efficient way to find divisors uses the complementary pair trick: check each integer i from 1 to √1600 ≈ 40.00. If i divides 1600, then both i and 1600/i are divisors.

1. 1 divides 1600 (1600 ÷ 1 = 1600) → pair (1, 1600)
2. 2 divides 1600 (1600 ÷ 2 = 800) → pair (2, 800)
3. 4 divides 1600 (1600 ÷ 4 = 400) → pair (4, 400)
4. 5 divides 1600 (1600 ÷ 5 = 320) → pair (5, 320)
5. 8 divides 1600 (1600 ÷ 8 = 200) → pair (8, 200)
6. 10 divides 1600 (1600 ÷ 10 = 160) → pair (10, 160)
7. 16 divides 1600 (1600 ÷ 16 = 100) → pair (16, 100)
8. 20 divides 1600 (1600 ÷ 20 = 80) → pair (20, 80)
9. 25 divides 1600 (1600 ÷ 25 = 64) → pair (25, 64)
10. 32 divides 1600 (1600 ÷ 32 = 50) → pair (32, 50)
11. 40 divides 1600 (1600 ÷ 40 = 40) → pair (40, 40)
12. Collect all unique values: {1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600} — total 21 divisors.
13. Sum: 1 + 2 + 4 + 5 + 8 + 10 + 16 + 20 + 25 + 32 + 40 + 50 + 64 + 80 + 100 + 160 + 200 + 320 + 400 + 800 + 1600 = 3937.

Nearby Examples

Related Operations for 1600

• Multiples of 1600 — "outward" complement; M is a multiple of 1600 ⇔ 1600 is a divisor of M
• 1600 Prime Factorization — decompose into prime building blocks
• Find GCF of 1600 and another number
• Find LCM of 1600 and another number
• Is 1600 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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