8731is an odd number,as it is not divisible by 2
The factors for 8731 are all the numbers between -8731 and 8731 , which divide 8731 without leaving any remainder. Since 8731 divided by -8731 is an integer, -8731 is a factor of 8731 .
Since 8731 divided by -8731 is a whole number, -8731 is a factor of 8731
Since 8731 divided by -1 is a whole number, -1 is a factor of 8731
Since 8731 divided by 1 is a whole number, 1 is a factor of 8731
Multiples of 8731 are all integers divisible by 8731 , i.e. the remainder of the full division by 8731 is zero. There are infinite multiples of 8731. The smallest multiples of 8731 are:
0 : in fact, 0 is divisible by any integer, so it is also a multiple of 8731 since 0 × 8731 = 0
8731 : in fact, 8731 is a multiple of itself, since 8731 is divisible by 8731 (it was 8731 / 8731 = 1, so the rest of this division is zero)
17462: in fact, 17462 = 8731 × 2
26193: in fact, 26193 = 8731 × 3
34924: in fact, 34924 = 8731 × 4
43655: in fact, 43655 = 8731 × 5
etc.
It is possible to determine using mathematical techniques whether an integer is prime or not.
for 8731, the answer is: yes, 8731 is a prime number because it only has two different divisors: 1 and itself (8731).
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 8731). 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 93.44 ). 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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