1.If a number does not have any factors other than itself and one, it is called a prime number.
2.A composite number is a positive whole number which is divisible without a remainder by any other positive whole number besides one and itself.
3.If a number can be divided without a remainder by another number, it's the multiple of the latter(后者).
4.A whole number being divisible without a remainder by another whole number
整数：whole number,(被)整除：divisible without a remainder (by),另一整数：another whole nuber,质数：prime number,合数：composite number,倍数：multiple,正整数：positive whole number