19990089

素因数分解:

$3^2\times 7^2\times {\mathrm{45329}}^1$

素因数の和:45349

約数の個数: 18

約数和(自身を含む): 33589530

約数和(自身を除く): 13599441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45329, 135987, 317303, 407961, 951909, 2221121, 2855727, 6663363, 19990089]

約数ペア:

[(1, 19990089), (3, 6663363), (7, 2855727), (9, 2221121), (21, 951909), (49, 407961), (63, 317303), (147, 135987), (441, 45329)]