Solutions by everydaycalculation.com

The GCF of 1680 and 640 is 80.

- Find the prime factorization of 1680

1680 = 2 × 2 × 2 × 2 × 3 × 5 × 7 - Find the prime factorization of 640

640 = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 2 × 2 × 2 × 2 × 5 - GCF =
**80**

MathStep (Works offline)

Download our mobile app and learn how to find GCF of upto four numbers in your own time:

Android and iPhone/ iPad

Find hcf of: 3360 & 1280 840 & 320 5040 & 1920 8400 & 3200 336 & 128 3360 & 640 1680 & 1280 5040 & 640 1680 & 1920 8400 & 640 1680 & 3200 1680 & 4480

Enter two numbers separate by comma. To find GCF of more than two numbers, click here.

The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).

© everydaycalculation.com