19857640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{45131}}^1$

素因数の和:45153

約数の個数: 32

約数和(自身を含む): 48742560

約数和(自身を除く): 28884920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 45131, 90262, 180524, 225655, 361048, 451310, 496441, 902620, 992882, 1805240, 1985764, 2482205, 3971528, 4964410, 9928820, 19857640]

約数ペア:

[(1, 19857640), (2, 9928820), (4, 4964410), (5, 3971528), (8, 2482205), (10, 1985764), (11, 1805240), (20, 992882), (22, 902620), (40, 496441), (44, 451310), (55, 361048), (88, 225655), (110, 180524), (220, 90262), (440, 45131)]