18381321

素因数分解:

$3^2\times 7^2\times {\mathrm{41681}}^1$

素因数の和:41701

約数の個数: 18

約数和(自身を含む): 30886362

約数和(自身を除く): 12505041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 41681, 125043, 291767, 375129, 875301, 2042369, 2625903, 6127107, 18381321]

約数ペア:

[(1, 18381321), (3, 6127107), (7, 2625903), (9, 2042369), (21, 875301), (49, 375129), (63, 291767), (147, 125043), (441, 41681)]