18909020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72727}}^1$

素因数の和:72749

約数の個数: 24

約数和(自身を含む): 42764064

約数和(自身を除く): 23855044

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72727, 145454, 290908, 363635, 727270, 945451, 1454540, 1890902, 3781804, 4727255, 9454510, 18909020]

約数ペア:

[(1, 18909020), (2, 9454510), (4, 4727255), (5, 3781804), (10, 1890902), (13, 1454540), (20, 945451), (26, 727270), (52, 363635), (65, 290908), (130, 145454), (260, 72727)]