Factors of 1977

The factors of 1977 are 1, 3, 659, 1977. It has 4 factors.

Factors of 1977

Pick any whole number from 1 to 10,000.

1977 = 3 \times 659

How to work it out

1
A factor of 1977 is a whole number that divides it with nothing left over. You only need to test the numbers up to √1977 ≈ 44.46; 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.
$1977 = 3 \times 659$
4
Add all the factors: 1 + 3 + 659 + 1977 = 2640. Without 1977 itself that is 663, so 1977 is a deficient number.

LaTeX source of the formulas on this page

\[ 1977 = 3 \times 659 \]

Factor	Pairs with	Product
1	1977	1 × 1977 = 1977
3	659	3 × 659 = 1977

What are the factors of 1977?

The factors of 1977 are 1, 3, 659, 1977. It has 4 factors.

What are the prime factors of 1977?

3, 659. As a product: 3 × 659.

How many factors does 1977 have?

1977 has 4 factors (2 factor pairs).

What is the sum of the factors of 1977?

2640.

Is 1977 a prime number?

No. It is divisible by 3, so 1977 = 3 × 659.