LCM for 20 and 23

The first method to find LCM for numbers 20 and 23 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 20 and 23 is 1, so

LCM = (20 × 23) ÷ 1

LCM = 460 ÷ 1

LCM = 460

The second method to find LCM for numbers 20 and 23 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 20: 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300, 320, 340, 360, 380, 400, 420, 440, 460, 480, 500

Multiples of 23: 23, 46, 69, 92, 115, 138, 161, 184, 207, 230, 253, 276, 299, 322, 345, 368, 391, 414, 437, 460, 483, 506

So the LCM for 20 and 23 is 460

Another method to find LCM for numbers 20 and 23 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors: