GCF (HCF) of 90 and 465

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What is the Greatest Common Divisor of 90 and 465?

Answer

GCF (HCF) of 90 and 465 is
15

Common factors: 1, 3, 5, 15

15 divides both: 90 ÷ 15 = 6, 465 ÷ 15 = 31 — and 6 and 31 share no factor but 1, so no larger number divides both.

90 = 2 × 32 × 5

465 = 3 × 5 × 31

Prime90465Lowest power
22——
33233
5555
31—31—

— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.

GCF = 3 × 5 = 15

See Also

FAQ

What is the Greatest Common Divisor of 90 and 465?

GCF (HCF) of 90 and 465 is 15

How to find the GCF of 90 and 465?

You can find the GCF of 90 and 465 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 90 and 465 is 15.

What prime factors do 90 and 465 share?

The prime factorizations of 90 and 465 have 3 × 5 in common, and multiplying those shared primes gives 15 — exactly the greatest common factor.

How does the GCF reduce the fraction 90/465?

Divide the numerator and the denominator by the GCF 15: 90 ÷ 15 = 6 and 465 ÷ 15 = 31. So 90/465 in lowest terms is 6/31.