Factors of 221

The factors of 221 are 1, 13, 17, 221. It has 4 factors.

Factors of 221

Pick any whole number from 1 to 10,000.

221 = 13 \times 17

How to work it out

1
A factor of 221 is a whole number that divides it with nothing left over. You only need to test the numbers up to √221 ≈ 14.87; 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.
$221 = 13 \times 17$
4
Add all the factors: 1 + 13 + 17 + 221 = 252. Without 221 itself that is 31, so 221 is a deficient number.

LaTeX source of the formulas on this page

\[ 221 = 13 \times 17 \]

Factor	Pairs with	Product
1	221	1 × 221 = 221
13	17	13 × 17 = 221

What are the factors of 221?

The factors of 221 are 1, 13, 17, 221. It has 4 factors.

What are the prime factors of 221?

13, 17. As a product: 13 × 17.

How many factors does 221 have?

221 has 4 factors (2 factor pairs).

What is the sum of the factors of 221?

252.

Is 221 a prime number?

No. It is divisible by 13, so 221 = 13 × 17.