Factors of 1228

2, 307. As a product: 2^2 × 307.

The factors of 1228 are 1, 2, 4, 307, 614, 1228. It has 6 factors.

Factors of 1228

Pick any whole number from 1 to 10,000.

1228 = 2^{2} \times 307

How to work it out

1
A factor of 1228 is a whole number that divides it with nothing left over. You only need to test the numbers up to √1228 ≈ 35.04; every one that divides gives a pair.
2
The factor pairs are listed in the table below. Together they give 6 factors.
3
Prime factorisation: keep dividing by the smallest prime that fits.
$1228 = 2^{2} \times 307$
4
Add all the factors: 1 + 2 + 4 + 307 + 614 + 1228 = 2156. Without 1228 itself that is 928, so 1228 is a deficient number.

LaTeX source of the formulas on this page

\[ 1228 = 2^{2} \times 307 \]

What are the factors of 1228?

The factors of 1228 are 1, 2, 4, 307, 614, 1228. It has 6 factors.

What are the prime factors of 1228?

2, 307. As a product: $2^{2}$ × 307.

How many factors does 1228 have?

1228 has 6 factors (3 factor pairs).

What is the sum of the factors of 1228?

2156.

Is 1228 a prime number?

No. It is divisible by 2, so 1228 = 2 × 614.