answersLogoWhite

0

The factors of 18 are 1, 2, 3, 6, 9, and 18.

The factors of 21 are 1, 3, 7, and 21.

The common factors are 1 and 3. Therefore, the least common factor (the smallest common factor) is 1.

Factorizations:

18-3x3x2

21-7x3

User Avatar

Wiki User

14y ago

What else can I help you with?