118423is an odd number,as it is not divisible by 2
The factors for 118423 are all the numbers between -118423 and 118423 , which divide 118423 without leaving any remainder. Since 118423 divided by -118423 is an integer, -118423 is a factor of 118423 .
Since 118423 divided by -118423 is a whole number, -118423 is a factor of 118423
Since 118423 divided by -1 is a whole number, -1 is a factor of 118423
Since 118423 divided by 1 is a whole number, 1 is a factor of 118423
Multiples of 118423 are all integers divisible by 118423 , i.e. the remainder of the full division by 118423 is zero. There are infinite multiples of 118423. The smallest multiples of 118423 are:
0 : in fact, 0 is divisible by any integer, so it is also a multiple of 118423 since 0 × 118423 = 0
118423 : in fact, 118423 is a multiple of itself, since 118423 is divisible by 118423 (it was 118423 / 118423 = 1, so the rest of this division is zero)
236846: in fact, 236846 = 118423 × 2
355269: in fact, 355269 = 118423 × 3
473692: in fact, 473692 = 118423 × 4
592115: in fact, 592115 = 118423 × 5
etc.
It is possible to determine using mathematical techniques whether an integer is prime or not.
for 118423, the answer is: yes, 118423 is a prime number because it only has two different divisors: 1 and itself (118423).
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 118423). 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 344.126 ). 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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