For less than the price of an exercise booklet, keep this website updated

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

Accordingly:

**400** is multiplo of **1**

**400** is multiplo of **2**

**400** is multiplo of **4**

**400** is multiplo of **5**

**400** is multiplo of **8**

**400** is multiplo of **10**

**400** is multiplo of **16**

**400** is multiplo of **20**

**400** is multiplo of **25**

**400** is multiplo of **40**

**400** is multiplo of **50**

**400** is multiplo of **80**

**400** is multiplo of **100**

**400** is multiplo of **200**

**400** has **14 positive divisors **

In addition we can say of the number **400 that it is even**

400 is an even number, as it is divisible by 2 : 400/2 = 200

The factors for 400 are all the numbers between -400 and 400 , which divide 400 without leaving any remainder. Since 400 divided by -400 is an integer, -400 is a factor of 400 .

Since 400 divided by -400 is a whole number, -400 is a factor of 400

Since 400 divided by -200 is a whole number, -200 is a factor of 400

Since 400 divided by -100 is a whole number, -100 is a factor of 400

Since 400 divided by -80 is a whole number, -80 is a factor of 400

Since 400 divided by -50 is a whole number, -50 is a factor of 400

Since 400 divided by -40 is a whole number, -40 is a factor of 400

Since 400 divided by -25 is a whole number, -25 is a factor of 400

Since 400 divided by -20 is a whole number, -20 is a factor of 400

Since 400 divided by -16 is a whole number, -16 is a factor of 400

Since 400 divided by -10 is a whole number, -10 is a factor of 400

Since 400 divided by -8 is a whole number, -8 is a factor of 400

Since 400 divided by -5 is a whole number, -5 is a factor of 400

Since 400 divided by -4 is a whole number, -4 is a factor of 400

Since 400 divided by -2 is a whole number, -2 is a factor of 400

Since 400 divided by -1 is a whole number, -1 is a factor of 400

Since 400 divided by 1 is a whole number, 1 is a factor of 400

Since 400 divided by 2 is a whole number, 2 is a factor of 400

Since 400 divided by 4 is a whole number, 4 is a factor of 400

Since 400 divided by 5 is a whole number, 5 is a factor of 400

Since 400 divided by 8 is a whole number, 8 is a factor of 400

Since 400 divided by 10 is a whole number, 10 is a factor of 400

Since 400 divided by 16 is a whole number, 16 is a factor of 400

Since 400 divided by 20 is a whole number, 20 is a factor of 400

Since 400 divided by 25 is a whole number, 25 is a factor of 400

Since 400 divided by 40 is a whole number, 40 is a factor of 400

Since 400 divided by 50 is a whole number, 50 is a factor of 400

Since 400 divided by 80 is a whole number, 80 is a factor of 400

Since 400 divided by 100 is a whole number, 100 is a factor of 400

Since 400 divided by 200 is a whole number, 200 is a factor of 400

Multiples of 400 are all integers divisible by 400 , i.e. the remainder of the full division by 400 is zero. There are infinite multiples of 400. The smallest multiples of 400 are:

0 : in fact, 0 is divisible by any integer, so it is also a multiple of 400 since 0 × 400 = 0

400 : in fact, 400 is a multiple of itself, since 400 is divisible by 400 (it was 400 / 400 = 1, so the rest of this division is zero)

etc.

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

for 400, the answer is:
**No, 400 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 400). 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 20 ). 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 Numbers: ... 398, 399

Previous prime number: 397

Next prime number: 401

© calculomates.com• Madrid • Spain

Copyright © 2019

Copyright © 2019