Factor Calculator

Factors of 43

The factors of 43 are 1 and 43. Since 43 is a prime number, it has exactly 2 factors and cannot be divided evenly by any other whole number. The sum of its factors is 44, and its prime factorization is simply 43 itself.

All factors of 43

Here are all 2 factors of 43, listed from smallest to largest.

143

Factor pairs of 43

There is only one factor pair for 43, because it is prime.

1 × 43 = 43

Prime factorization of 43

43 is a prime number, so it cannot be broken down further. Its prime factorization is simply 43.

Properties of 43

Number of factors2
Sum of factors44
Sum of proper factors1
Prime factorization43
Prime or composite?Prime
Even or odd?Odd
Perfect square?No
Perfect cube?No
ClassificationDeficient

What makes 43 interesting

  • 43 is a prime number, so its only factors are 1 and 43. It cannot be split into a product of two smaller whole numbers.
  • Every prime number is deficient — the sum of its proper factors is always 1, which is far less than the number itself.

How to find the factors of 43 yourself

Divide 43 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 √43 ≈ 6.56, because every factor above that pairs with one below it.

43 ÷ 1 = 43 ✓

Reading both columns gives every factor: 1, 43. The factor calculator does this automatically for any number.

Numbers mathematically connected to 43.

Frequently asked questions about 43

What are the factors of 43?

The factors of 43 are 1 and 43. That is 2 factors in total, counting both 1 and 43.

Is 43 a prime number?

Yes, 43 is a prime number. It has exactly two factors: 1 and 43. No other whole number divides it evenly.

What is the prime factorization of 43?

43 is already prime, so its prime factorization is simply 43. It cannot be broken down any further.

What two numbers multiply to give 43?

There is 1 pair of whole numbers that multiply to 43: 1 × 43.

What is the sum of the factors of 43?

Adding all the factors of 43 together gives 44. Excluding 43 itself, the proper factors sum to 1.

Is 43 a perfect square?

No, 43 is not a perfect square. There is no whole number that multiplies by itself to give 43. The nearest perfect squares are 36 and 49.

What is the largest factor of 43 other than itself?

The largest factor of 43 apart from 43 itself is 1, since 43 ÷ 1 = 43.

How many factors does 43 have?

43 has 2 factors: 1 and 43.

Explore more

Try another number in the factor calculator, break 43 down further with the prime factorization calculator, or compare 43 with another number using the GCF calculator and LCM calculator. For divisor counts and sums, see the divisor calculator.