28020520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1481}}^1$

素因数の和:1546

約数の個数: 64

約数和(自身を含む): 70424640

約数和(自身を除く): 42404120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 1481, 1720, 1892, 2365, 2962, 3784, 4730, 5924, 7405, 9460, 11848, 14810, 16291, 18920, 29620, 32582, 59240, 63683, 65164, 81455, 127366, 130328, 162910, 254732, 318415, 325820, 509464, 636830, 651640, 700513, 1273660, 1401026, 2547320, 2802052, 3502565, 5604104, 7005130, 14010260, 28020520]

約数ペア:

[(1, 28020520), (2, 14010260), (4, 7005130), (5, 5604104), (8, 3502565), (10, 2802052), (11, 2547320), (20, 1401026), (22, 1273660), (40, 700513), (43, 651640), (44, 636830), (55, 509464), (86, 325820), (88, 318415), (110, 254732), (172, 162910), (215, 130328), (220, 127366), (344, 81455), (430, 65164), (440, 63683), (473, 59240), (860, 32582), (946, 29620), (1481, 18920), (1720, 16291), (1892, 14810), (2365, 11848), (2962, 9460), (3784, 7405), (4730, 5924)]