Factors of 245
The factors of 245 are 1, 5, 7, 35, 49, and 245. In total, 245 has 6 factors. Its prime factorization is 5 × 7², and the sum of all its factors is 342.
All factors of 245
Here are all 6 factors of 245, listed from smallest to largest.
Factor pairs of 245
These 3 pairs of whole numbers each multiply to give 245.
Prime factorization of 245
Dividing 245 by the smallest prime at each step gives its prime factorization:
The distinct prime factors of 245 are 5, 7. To factorize any other number, use the prime factorization calculator.
Factor tree of 245
A factor tree shows the same prime factorization visually. Each composite branch splits until every endpoint is a prime number.
Properties of 245
| Number of factors | 6 |
|---|---|
| Sum of factors | 342 |
| Sum of proper factors | 97 |
| Prime factorization | 5 × 7² |
| Prime or composite? | Composite |
| Even or odd? | Odd |
| Perfect square? | No |
| Perfect cube? | No |
| Classification | Deficient |
What makes 245 interesting
- 245 is a composite number, meaning it has more than two factors. It can be written as a product of smaller whole numbers in 3 different ways.
- 245 is a deficient number: its proper factors sum to 97, which is 148 less than 245 itself.
How to find the factors of 245 yourself
Divide 245 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 √245 ≈ 15.65, because every factor above that pairs with one below it.
Reading both columns gives every factor: 1, 5, 7, 35, 49, 245. The factor calculator does this automatically for any number.
Related numbers
Numbers mathematically connected to 245.
Frequently asked questions about 245
What are the factors of 245?
Is 245 a prime number?
What is the prime factorization of 245?
What two numbers multiply to give 245?
What is the sum of the factors of 245?
Is 245 a perfect square?
What is the largest factor of 245 other than itself?
How many factors does 245 have?
Explore more
Try another number in the factor calculator, break 245 down further with the prime factorization calculator, or compare 245 with another number using the GCF calculator and LCM calculator. For divisor counts and sums, see the divisor calculator.