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The list of **all positive divisors** (that is, the list of all integers that **divide 22**) is as follows :

Accordingly:

**2020** is multiplo of **1**

**2020** is multiplo of **2**

**2020** is multiplo of **4**

**2020** is multiplo of **5**

**2020** is multiplo of **10**

**2020** is multiplo of **20**

**2020** is multiplo of **101**

**2020** is multiplo of **202**

**2020** is multiplo of **404**

**2020** is multiplo of **505**

**2020** is multiplo of **1010**

**2020** has **11 positive divisors **

In addition we can say of the number **2020 that it is even**

2020 is an even number, as it is divisible by 2 : 2020/2 = 1010

The factors for 2020 are all the numbers between -2020 and 2020 , which divide 2020 without leaving any remainder. Since 2020 divided by -2020 is an integer, -2020 is a factor of 2020 .

Since 2020 divided by -2020 is a whole number, -2020 is a factor of 2020

Since 2020 divided by -1010 is a whole number, -1010 is a factor of 2020

Since 2020 divided by -505 is a whole number, -505 is a factor of 2020

Since 2020 divided by -404 is a whole number, -404 is a factor of 2020

Since 2020 divided by -202 is a whole number, -202 is a factor of 2020

Since 2020 divided by -101 is a whole number, -101 is a factor of 2020

Since 2020 divided by -20 is a whole number, -20 is a factor of 2020

Since 2020 divided by -10 is a whole number, -10 is a factor of 2020

Since 2020 divided by -5 is a whole number, -5 is a factor of 2020

Since 2020 divided by -4 is a whole number, -4 is a factor of 2020

Since 2020 divided by -2 is a whole number, -2 is a factor of 2020

Since 2020 divided by -1 is a whole number, -1 is a factor of 2020

Since 2020 divided by 1 is a whole number, 1 is a factor of 2020

Since 2020 divided by 2 is a whole number, 2 is a factor of 2020

Since 2020 divided by 4 is a whole number, 4 is a factor of 2020

Since 2020 divided by 5 is a whole number, 5 is a factor of 2020

Since 2020 divided by 10 is a whole number, 10 is a factor of 2020

Since 2020 divided by 20 is a whole number, 20 is a factor of 2020

Since 2020 divided by 101 is a whole number, 101 is a factor of 2020

Since 2020 divided by 202 is a whole number, 202 is a factor of 2020

Since 2020 divided by 404 is a whole number, 404 is a factor of 2020

Since 2020 divided by 505 is a whole number, 505 is a factor of 2020

Since 2020 divided by 1010 is a whole number, 1010 is a factor of 2020

Multiples of 2020 are all integers divisible by 2020 , i.e. the remainder of the full division by 2020 is zero. There are infinite multiples of 2020. The smallest multiples of 2020 are:

0 : in fact, 0 is divisible by any integer, so it is also a multiple of 2020 since 0 × 2020 = 0

2020 : in fact, 2020 is a multiple of itself, since 2020 is divisible by 2020 (it was 2020 / 2020 = 1, so the rest of this division is zero)

4040: in fact, 4040 = 2020 × 2

6060: in fact, 6060 = 2020 × 3

8080: in fact, 8080 = 2020 × 4

10100: in fact, 10100 = 2020 × 5

etc.

It is possible to determine using mathematical techniques whether an integer is prime or not.

for 2020, the answer is:
**No, 2020 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 2020). 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 44.944 ). 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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