21503721820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^2\times {\mathrm{91373}}^1$

素因数の和:91471

約数の個数: 72

約数和(自身を含む): 52898967072

約数和(自身を除く): 31395245252

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 1681, 2870, 3362, 5740, 6724, 8405, 11767, 16810, 23534, 33620, 47068, 58835, 91373, 117670, 182746, 235340, 365492, 456865, 639611, 913730, 1279222, 1827460, 2558444, 3198055, 3746293, 6396110, 7492586, 12792220, 14985172, 18731465, 26224051, 37462930, 52448102, 74925860, 104896204, 131120255, 153598013, 262240510, 307196026, 524481020, 614392052, 767990065, 1075186091, 1535980130, 2150372182, 3071960260, 4300744364, 5375930455, 10751860910, 21503721820]

約数ペア:

[(1, 21503721820), (2, 10751860910), (4, 5375930455), (5, 4300744364), (7, 3071960260), (10, 2150372182), (14, 1535980130), (20, 1075186091), (28, 767990065), (35, 614392052), (41, 524481020), (70, 307196026), (82, 262240510), (140, 153598013), (164, 131120255), (205, 104896204), (287, 74925860), (410, 52448102), (574, 37462930), (820, 26224051), (1148, 18731465), (1435, 14985172), (1681, 12792220), (2870, 7492586), (3362, 6396110), (5740, 3746293), (6724, 3198055), (8405, 2558444), (11767, 1827460), (16810, 1279222), (23534, 913730), (33620, 639611), (47068, 456865), (58835, 365492), (91373, 235340), (117670, 182746)]