What two number when multiplied equals 3991 (three thousand nine hundred ninety one)?
From the aboves multiple we can see that 3991 is a multiple of 4 numbers.
The numbers are 1, 13, 307, 3991
These numbers are called the factors of 3991.
13 x 307= 3991
A prime number is a number that is divisible only by 1 and itself (without a remainder).
3991 is not a prime number because it is divisible by other number than 1 and itself.
Lets learn factorization of other numbers.