What are the divisors of 4769?

1, 19, 251, 4769

There is a total of 4 positive divisors.
The sum of these divisors is 5040.
The arithmetic mean is 1260.

4 odd divisors

1, 19, 251, 4769

How to compute the divisors of 4769?

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 4769 by each of the numbers from 1 to 4769 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)

4769 / 1 = 4769 (the remainder is 0, so 1 is a divisor of 4769)
4769 / 2 = 2384.5 (the remainder is 1, so 2 is not a divisor of 4769)
4769 / 3 = 1589.6666666667 (the remainder is 2, so 3 is not a divisor of 4769)
...
4769 / 4768 = 1.0002097315436 (the remainder is 1, so 4768 is not a divisor of 4769)
4769 / 4769 = 1 (the remainder is 0, so 4769 is a divisor of 4769)

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 4769 (i.e. 69.057946682478). 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 $\frac{N}{d} = D$ )

4769 / 1 = 4769 (the remainder is 0, so 1 and 4769 are divisors of 4769)
4769 / 2 = 2384.5 (the remainder is 1, so 2 is not a divisor of 4769)
4769 / 3 = 1589.6666666667 (the remainder is 2, so 3 is not a divisor of 4769)
...
4769 / 68 = 70.132352941176 (the remainder is 9, so 68 is not a divisor of 4769)
4769 / 69 = 69.115942028986 (the remainder is 8, so 69 is not a divisor of 4769)