What are the divisors of 3766?

1, 2, 7, 14, 269, 538, 1883, 3766

There is a total of 8 positive divisors.
The sum of these divisors is 6480.
The arithmetic mean is 810.

4 even divisors

2, 14, 538, 3766

4 odd divisors

1, 7, 269, 1883

How to compute the divisors of 3766?

A number N is said to be divisible by a number M (with M non-zero) if, when we divide N by M, the remainder of the division is zero.

$N mod M = 0$

Brute force algorithm

We could start by using a brute-force method which would involve dividing 3766 by each of the numbers from 1 to 3766 to determine which ones have a remainder equal to 0.

$Remainder = N - (M \times ⌊ \frac{N}{M} ⌋)$

(where $⌊ \frac{N}{M} ⌋$ is the integer part of the quotient)

3766 / 1 = 3766 (the remainder is 0, so 1 is a divisor of 3766)
3766 / 2 = 1883 (the remainder is 0, so 2 is a divisor of 3766)
3766 / 3 = 1255.3333333333 (the remainder is 1, so 3 is not a divisor of 3766)
...
3766 / 3765 = 1.0002656042497 (the remainder is 1, so 3765 is not a divisor of 3766)
3766 / 3766 = 1 (the remainder is 0, so 3766 is a divisor of 3766)

Improved algorithm using square-root

However, there is another slightly better approach that reduces the number of iterations by testing only integers less than or equal to the square root of 3766 (i.e. 61.367743970265). Indeed, if a number N has a divisor D greater than its square root, then there is necessarily a smaller divisor d such that:

$D \times d = N$

(thus, if $\frac{N}{D} = d$ , then $\frac{N}{d} = D$ )

3766 / 1 = 3766 (the remainder is 0, so 1 and 3766 are divisors of 3766)
3766 / 2 = 1883 (the remainder is 0, so 2 and 1883 are divisors of 3766)
3766 / 3 = 1255.3333333333 (the remainder is 1, so 3 is not a divisor of 3766)
...
3766 / 60 = 62.766666666667 (the remainder is 46, so 60 is not a divisor of 3766)
3766 / 61 = 61.737704918033 (the remainder is 45, so 61 is not a divisor of 3766)