18201771

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{6719}}^1$

素因数の和:6775

約数の個数: 24

約数和(自身を含む): 30750720

約数和(自身を除く): 12548949

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 6719, 20157, 47033, 60471, 141099, 288917, 423297, 866751, 2022419, 2600253, 6067257, 18201771]

約数ペア:

[(1, 18201771), (3, 6067257), (7, 2600253), (9, 2022419), (21, 866751), (43, 423297), (63, 288917), (129, 141099), (301, 60471), (387, 47033), (903, 20157), (2709, 6719)]