Factors of 505

The factors of 505 are 1, 5, 101, 505. It has 4 factors.

Factors of 505

Pick any whole number from 1 to 10,000.

505 = 5 \times 101

How to work it out

1
A factor of 505 is a whole number that divides it with nothing left over. You only need to test the numbers up to √505 ≈ 22.47; 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.
$505 = 5 \times 101$
4
Add all the factors: 1 + 5 + 101 + 505 = 612. Without 505 itself that is 107, so 505 is a deficient number.

LaTeX source of the formulas on this page

\[ 505 = 5 \times 101 \]

Factor	Pairs with	Product
1	505	1 × 505 = 505
5	101	5 × 101 = 505

What are the factors of 505?

The factors of 505 are 1, 5, 101, 505. It has 4 factors.

What are the prime factors of 505?

5, 101. As a product: 5 × 101.

How many factors does 505 have?

505 has 4 factors (2 factor pairs).

What is the sum of the factors of 505?

612.

Is 505 a prime number?

No. It is divisible by 5, so 505 = 5 × 101.