(9, 21)

A = 9

B = 21

Sum 30
Difference 12
A × B 189
A ÷ B 0.42857142857142855
B ÷ A 2.3333333333333335
GCD 3
LCM 63
Average 15

Sum of squares

522

\[ 9^2 + 21^2 = 522 \]

Norm

$\sqrt{ 9^2 + 21^2 } = 22.847319317591726$

Geometric mean

13.74772708486752

(9, 21) is amicable?

No

Properties of 9 and 21

Properties of 9 and 21: The GCD and LCM of 9 and 21 are 3 and 63 respectively. 9 + 21 = 30, |9 - 21| = 12, 9 * 21 = 189, 9 / 21 = 0.42857142857142855, 21 / 9 = 2.3333333333333335. The average of 9 and 21 is 15 and the norm of them is 22.847319317591726. The geometric mean of two numbers is 13.74772708486752.