What two number when multiplied equals 15 (fifteen)?
From the aboves multiple we can see that 15 is a multiple of 4 numbers.
The numbers are 1, 3, 5, 15
These numbers are called the factors of 15.
3 x 5= 15
A prime number is a number that is divisible only by 1 and itself (without a remainder).
15 is not a prime number because it is divisible by other number than 1 and itself.
Lets learn factorization of other numbers.