The list of all positive divisors (that is, the list of all integers that divide 22) is as follows :
248 is multiplo of 1
248 is multiplo of 2
248 is multiplo of 4
248 is multiplo of 8
248 is multiplo of 31
248 is multiplo of 62
248 is multiplo of 124
248 has 7 positive divisors
In addition we can say of the number 248 that it is even
248 is an even number, as it is divisible by 2 : 248/2 = 124
The factors for 248 are all the numbers between -248 and 248 , which divide 248 without leaving any remainder. Since 248 divided by -248 is an integer, -248 is a factor of 248 .
Since 248 divided by -248 is a whole number, -248 is a factor of 248
Since 248 divided by -124 is a whole number, -124 is a factor of 248
Since 248 divided by -62 is a whole number, -62 is a factor of 248
Since 248 divided by -31 is a whole number, -31 is a factor of 248
Since 248 divided by -8 is a whole number, -8 is a factor of 248
Since 248 divided by -4 is a whole number, -4 is a factor of 248
Since 248 divided by -2 is a whole number, -2 is a factor of 248
Since 248 divided by -1 is a whole number, -1 is a factor of 248
Multiples of 248 are all integers divisible by 248 , i.e. the remainder of the full division by 248 is zero. There are infinite multiples of 248. The smallest multiples of 248 are:
It is possible to determine using mathematical techniques whether an integer is prime or not.
for 248, the answer is: No, 248 is not a prime number.
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 248). 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 15.748 ). 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.
Previous prime number: 241
Next prime number: 251