81457640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{185131}}^1$

素因数の和:185153

約数の個数: 32

約数和(自身を含む): 199942560

約数和(自身を除く): 118484920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 185131, 370262, 740524, 925655, 1481048, 1851310, 2036441, 3702620, 4072882, 7405240, 8145764, 10182205, 16291528, 20364410, 40728820, 81457640]

約数ペア:

[(1, 81457640), (2, 40728820), (4, 20364410), (5, 16291528), (8, 10182205), (10, 8145764), (11, 7405240), (20, 4072882), (22, 3702620), (40, 2036441), (44, 1851310), (55, 1481048), (88, 925655), (110, 740524), (220, 370262), (440, 185131)]