LCM for 13 and 17

The first method to find LCM for numbers 13 and 17 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 13 and 17 is 1, so

LCM = (13 × 17) ÷ 1

LCM = 221 ÷ 1

LCM = 221

The second method to find LCM for numbers 13 and 17 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 13: 13, 26, 39, 52, 65, 78, 91, 104, 117, 130, 143, 156, 169, 182, 195, 208, 221, 234, 247

Multiples of 17: 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255

So the LCM for 13 and 17 is 221

Another method to find LCM for numbers 13 and 17 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors: