What are the divisors of 9197?

1, 17, 541, 9197

There is a total of 4 positive divisors.
The sum of these divisors is 9756.
The arithmetic mean is 2439.

4 odd divisors

1, 17, 541, 9197

How to compute the divisors of 9197?

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 9197 by each of the numbers from 1 to 9197 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)

9197 / 1 = 9197 (the remainder is 0, so 1 is a divisor of 9197)
9197 / 2 = 4598.5 (the remainder is 1, so 2 is not a divisor of 9197)
9197 / 3 = 3065.6666666667 (the remainder is 2, so 3 is not a divisor of 9197)
...
9197 / 9196 = 1.0001087429317 (the remainder is 1, so 9196 is not a divisor of 9197)
9197 / 9197 = 1 (the remainder is 0, so 9197 is a divisor of 9197)

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 9197 (i.e. 95.900990610108). 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 $\frac{N}{d} = D$ )

9197 / 1 = 9197 (the remainder is 0, so 1 and 9197 are divisors of 9197)
9197 / 2 = 4598.5 (the remainder is 1, so 2 is not a divisor of 9197)
9197 / 3 = 3065.6666666667 (the remainder is 2, so 3 is not a divisor of 9197)
...
9197 / 94 = 97.840425531915 (the remainder is 79, so 94 is not a divisor of 9197)
9197 / 95 = 96.810526315789 (the remainder is 77, so 95 is not a divisor of 9197)