81970900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1733}}^1$

素因数の和:1801

約数の個数: 72

約数和(自身を含む): 198674784

約数和(自身を除く): 116703884

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 43, 44, 50, 55, 86, 100, 110, 172, 215, 220, 275, 430, 473, 550, 860, 946, 1075, 1100, 1733, 1892, 2150, 2365, 3466, 4300, 4730, 6932, 8665, 9460, 11825, 17330, 19063, 23650, 34660, 38126, 43325, 47300, 74519, 76252, 86650, 95315, 149038, 173300, 190630, 298076, 372595, 381260, 476575, 745190, 819709, 953150, 1490380, 1639418, 1862975, 1906300, 3278836, 3725950, 4098545, 7451900, 8197090, 16394180, 20492725, 40985450, 81970900]

約数ペア:

[(1, 81970900), (2, 40985450), (4, 20492725), (5, 16394180), (10, 8197090), (11, 7451900), (20, 4098545), (22, 3725950), (25, 3278836), (43, 1906300), (44, 1862975), (50, 1639418), (55, 1490380), (86, 953150), (100, 819709), (110, 745190), (172, 476575), (215, 381260), (220, 372595), (275, 298076), (430, 190630), (473, 173300), (550, 149038), (860, 95315), (946, 86650), (1075, 76252), (1100, 74519), (1733, 47300), (1892, 43325), (2150, 38126), (2365, 34660), (3466, 23650), (4300, 19063), (4730, 17330), (6932, 11825), (8665, 9460)]