What are the divisors of 4654?

1, 2, 13, 26, 179, 358, 2327, 4654

There is a total of 8 positive divisors.
The sum of these divisors is 7560.
The arithmetic mean is 945.

4 even divisors

2, 26, 358, 4654

4 odd divisors

1, 13, 179, 2327

How to compute the divisors of 4654?

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 4654 by each of the numbers from 1 to 4654 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)

4654 / 1 = 4654 (the remainder is 0, so 1 is a divisor of 4654)
4654 / 2 = 2327 (the remainder is 0, so 2 is a divisor of 4654)
4654 / 3 = 1551.3333333333 (the remainder is 1, so 3 is not a divisor of 4654)
...
4654 / 4653 = 1.0002149151085 (the remainder is 1, so 4653 is not a divisor of 4654)
4654 / 4654 = 1 (the remainder is 0, so 4654 is a divisor of 4654)

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 4654 (i.e. 68.220231603242). 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 $\frac{N}{d} = D$ )

4654 / 1 = 4654 (the remainder is 0, so 1 and 4654 are divisors of 4654)
4654 / 2 = 2327 (the remainder is 0, so 2 and 2327 are divisors of 4654)
4654 / 3 = 1551.3333333333 (the remainder is 1, so 3 is not a divisor of 4654)
...
4654 / 67 = 69.462686567164 (the remainder is 31, so 67 is not a divisor of 4654)
4654 / 68 = 68.441176470588 (the remainder is 30, so 68 is not a divisor of 4654)