20845220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2311}}^1$

素因数の和:2372

約数の個数: 48

約数和(自身を含む): 48940416

約数和(自身を除く): 28095196

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, 2311, 4510, 4622, 9020, 9244, 11555, 23110, 25421, 46220, 50842, 94751, 101684, 127105, 189502, 254210, 379004, 473755, 508420, 947510, 1042261, 1895020, 2084522, 4169044, 5211305, 10422610, 20845220]

約数ペア:

[(1, 20845220), (2, 10422610), (4, 5211305), (5, 4169044), (10, 2084522), (11, 1895020), (20, 1042261), (22, 947510), (41, 508420), (44, 473755), (55, 379004), (82, 254210), (110, 189502), (164, 127105), (205, 101684), (220, 94751), (410, 50842), (451, 46220), (820, 25421), (902, 23110), (1804, 11555), (2255, 9244), (2311, 9020), (4510, 4622)]