What two number when multiplied equals 15821 (fifteen thousand eight hundred twenty one)?
From the aboves multiple we can see that 15821 is a multiple of 4 numbers.
The numbers are 1, 13, 1217, 15821
These numbers are called the factors of 15821.
13 x 1217= 15821
A prime number is a number that is divisible only by 1 and itself (without a remainder).
15821 is not a prime number because it is divisible by other number than 1 and itself.
Lets learn factorization of other numbers.