What are the divisors of 922?

1, 2, 461, 922

There is a total of 4 positive divisors.
The sum of these divisors is 1386.
The arithmetic mean is 346.5.

2 even divisors

2, 922

2 odd divisors

1, 461

How to compute the divisors of 922?

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 922 by each of the numbers from 1 to 922 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)

922 / 1 = 922 (the remainder is 0, so 1 is a divisor of 922)
922 / 2 = 461 (the remainder is 0, so 2 is a divisor of 922)
922 / 3 = 307.33333333333 (the remainder is 1, so 3 is not a divisor of 922)
...
922 / 921 = 1.0010857763301 (the remainder is 1, so 921 is not a divisor of 922)
922 / 922 = 1 (the remainder is 0, so 922 is a divisor of 922)

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 922 (i.e. 30.364452901378). 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 $\frac{N}{d} = D$ )

922 / 1 = 922 (the remainder is 0, so 1 and 922 are divisors of 922)
922 / 2 = 461 (the remainder is 0, so 2 and 461 are divisors of 922)
922 / 3 = 307.33333333333 (the remainder is 1, so 3 is not a divisor of 922)
...
922 / 29 = 31.793103448276 (the remainder is 23, so 29 is not a divisor of 922)
922 / 30 = 30.733333333333 (the remainder is 22, so 30 is not a divisor of 922)