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5209is an odd number,as it is not divisible by 2
The factors for 5209 are all the numbers between -5209 and 5209 , which divide 5209 without leaving any remainder. Since 5209 divided by -5209 is an integer, -5209 is a factor of 5209 .
Since 5209 divided by -5209 is a whole number, -5209 is a factor of 5209
Since 5209 divided by -1 is a whole number, -1 is a factor of 5209
Since 5209 divided by 1 is a whole number, 1 is a factor of 5209
Multiples of 5209 are all integers divisible by 5209 , i.e. the remainder of the full division by 5209 is zero. There are infinite multiples of 5209. The smallest multiples of 5209 are:
0 : in fact, 0 is divisible by any integer, so it is also a multiple of 5209 since 0 × 5209 = 0
5209 : in fact, 5209 is a multiple of itself, since 5209 is divisible by 5209 (it was 5209 / 5209 = 1, so the rest of this division is zero)
10418: in fact, 10418 = 5209 × 2
15627: in fact, 15627 = 5209 × 3
20836: in fact, 20836 = 5209 × 4
26045: in fact, 26045 = 5209 × 5
etc.
It is possible to determine using mathematical techniques whether an integer is prime or not.
for 5209, the answer is: yes, 5209 is a prime number because it only has two different divisors: 1 and itself (5209).
To know the primality of an integer, we can use several algorithms. The most naive is to try all divisors below the number you want to know if it is prime (in our case 5209). We can already eliminate even numbers bigger than 2 (then 4 , 6 , 8 ...). Besides, we can stop at the square root of the number in question (here 72.173 ). Historically, the Eratosthenes screen (which dates back to Antiquity) uses this technique relatively effectively.
More modern techniques include the Atkin screen, probabilistic tests, or the cyclotomic test.
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