20827180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2309}}^1$

素因数の和:2370

約数の個数: 48

約数和(自身を含む): 48898080

約数和(自身を除く): 28070900

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2255, 2309, 4510, 4618, 9020, 9236, 11545, 23090, 25399, 46180, 50798, 94669, 101596, 126995, 189338, 253990, 378676, 473345, 507980, 946690, 1041359, 1893380, 2082718, 4165436, 5206795, 10413590, 20827180]

約数ペア:

[(1, 20827180), (2, 10413590), (4, 5206795), (5, 4165436), (10, 2082718), (11, 1893380), (20, 1041359), (22, 946690), (41, 507980), (44, 473345), (55, 378676), (82, 253990), (110, 189338), (164, 126995), (205, 101596), (220, 94669), (410, 50798), (451, 46180), (820, 25399), (902, 23090), (1804, 11545), (2255, 9236), (2309, 9020), (4510, 4618)]