Factor Calculator

Factors of 259

The factors of 259 are 1, 7, 37, and 259. In total, 259 has 4 factors. Its prime factorization is 7 × 37, and the sum of all its factors is 304.

All factors of 259

Here are all 4 factors of 259, listed from smallest to largest.

1737259

Factor pairs of 259

These 2 pairs of whole numbers each multiply to give 259.

1 × 259 = 259
7 × 37 = 259

Prime factorization of 259

Dividing 259 by the smallest prime at each step gives its prime factorization:

259 ÷ 7 = 37
37 ÷ 37 = 1
Result: 259 = 7 × 37 = 7 × 37

The distinct prime factors of 259 are 7, 37. To factorize any other number, use the prime factorization calculator.

Factor tree of 259

A factor tree shows the same prime factorization visually. Each composite branch splits until every endpoint is a prime number.

Factor tree of 259259737
Prime factors are shown in solid indigo. Composite numbers split into their smallest prime and the quotient.

Properties of 259

Number of factors4
Sum of factors304
Sum of proper factors45
Prime factorization7 × 37
Prime or composite?Composite
Even or odd?Odd
Perfect square?No
Perfect cube?No
ClassificationDeficient

What makes 259 interesting

  • 259 is a composite number, meaning it has more than two factors. It can be written as a product of smaller whole numbers in 2 different ways.
  • 259 is a deficient number: its proper factors sum to 45, which is 214 less than 259 itself.

How to find the factors of 259 yourself

Divide 259 by each whole number starting from 1. Whenever the division leaves no remainder, both the divisor and the quotient are factors. You only need to test up to √25916.09, because every factor above that pairs with one below it.

259 ÷ 1 = 259
259 ÷ 7 = 37

Reading both columns gives every factor: 1, 7, 37, 259. The factor calculator does this automatically for any number.

Frequently asked questions about 259

What are the factors of 259?

The factors of 259 are 1, 7, 37, and 259. That is 4 factors in total, counting both 1 and 259.

Is 259 a prime number?

No, 259 is not prime — it is a composite number with 4 factors. A prime number has exactly two factors, but 259 is also divisible by 7.

What is the prime factorization of 259?

The prime factorization of 259 is 7 × 37. Written out in full: 7 × 37 = 259. Its distinct prime factors are 7, 37.

What two numbers multiply to give 259?

There are 2 pairs of whole numbers that multiply to 259: 1 × 259, 7 × 37.

What is the sum of the factors of 259?

Adding all the factors of 259 together gives 304. Excluding 259 itself, the proper factors sum to 45.

Is 259 a perfect square?

No, 259 is not a perfect square. There is no whole number that multiplies by itself to give 259. The nearest perfect squares are 256 and 289.

What is the largest factor of 259 other than itself?

The largest factor of 259 apart from 259 itself is 37, since 259 ÷ 37 = 7.

How many factors does 259 have?

259 has 4 factors: 1, 7, 37, and 259. You can verify this from the prime factorization 7 × 37: add 1 to each exponent and multiply, giving 2 × 2 = 4.

Explore more

Try another number in the factor calculator, break 259 down further with the prime factorization calculator, or compare 259 with another number using the GCF calculator and LCM calculator. For divisor counts and sums, see the divisor calculator.