Factors of 3998

The factors of 3998 are 1, 2, 1999, 3998. It has 4 factors.

Factors of 3998

Pick any whole number from 1 to 10,000.

3998 = 2 \times 1999

How to work it out

1
A factor of 3998 is a whole number that divides it with nothing left over. You only need to test the numbers up to √3998 ≈ 63.23; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 4 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$3998 = 2 \times 1999$
4
Add all the factors: 1 + 2 + 1999 + 3998 = 6000. Without 3998 itself that is 2002, so 3998 is a deficient number.

LaTeX source of the formulas on this page

\[ 3998 = 2 \times 1999 \]

Factor	Pairs with	Product
1	3998	1 × 3998 = 3998
2	1999	2 × 1999 = 3998

What are the factors of 3998?

The factors of 3998 are 1, 2, 1999, 3998. It has 4 factors.

What are the prime factors of 3998?

2, 1999. As a product: 2 × 1999.

How many factors does 3998 have?

3998 has 4 factors (2 factor pairs).

What is the sum of the factors of 3998?

6000.

Is 3998 a prime number?

No. It is divisible by 2, so 3998 = 2 × 1999.