20764040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1151}}^1$

素因数の和:1214

約数の個数: 64

約数和(自身を含む): 52254720

約数和(自身を除く): 31490680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 451, 820, 902, 1151, 1640, 1804, 2255, 2302, 3608, 4510, 4604, 5755, 9020, 9208, 11510, 12661, 18040, 23020, 25322, 46040, 47191, 50644, 63305, 94382, 101288, 126610, 188764, 235955, 253220, 377528, 471910, 506440, 519101, 943820, 1038202, 1887640, 2076404, 2595505, 4152808, 5191010, 10382020, 20764040]

約数ペア:

[(1, 20764040), (2, 10382020), (4, 5191010), (5, 4152808), (8, 2595505), (10, 2076404), (11, 1887640), (20, 1038202), (22, 943820), (40, 519101), (41, 506440), (44, 471910), (55, 377528), (82, 253220), (88, 235955), (110, 188764), (164, 126610), (205, 101288), (220, 94382), (328, 63305), (410, 50644), (440, 47191), (451, 46040), (820, 25322), (902, 23020), (1151, 18040), (1640, 12661), (1804, 11510), (2255, 9208), (2302, 9020), (3608, 5755), (4510, 4604)]