21000306580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{3559}}^1\times {\mathrm{26821}}^1$

素因数の和:30400

約数の個数: 48

約数和(自身を含む): 48125105280

約数和(自身を除く): 27124798700

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 3559, 7118, 14236, 17795, 26821, 35590, 39149, 53642, 71180, 78298, 107284, 134105, 156596, 195745, 268210, 295031, 391490, 536420, 590062, 782980, 1180124, 1475155, 2950310, 5900620, 95455939, 190911878, 381823756, 477279695, 954559390, 1050015329, 1909118780, 2100030658, 4200061316, 5250076645, 10500153290, 21000306580]

約数ペア:

[(1, 21000306580), (2, 10500153290), (4, 5250076645), (5, 4200061316), (10, 2100030658), (11, 1909118780), (20, 1050015329), (22, 954559390), (44, 477279695), (55, 381823756), (110, 190911878), (220, 95455939), (3559, 5900620), (7118, 2950310), (14236, 1475155), (17795, 1180124), (26821, 782980), (35590, 590062), (39149, 536420), (53642, 391490), (71180, 295031), (78298, 268210), (107284, 195745), (134105, 156596)]