18932980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2099}}^1$

素因数の和:2160

約数の個数: 48

約数和(自身を含む): 44452800

約数和(自身を除く): 25519820

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2099, 2255, 4198, 4510, 8396, 9020, 10495, 20990, 23089, 41980, 46178, 86059, 92356, 115445, 172118, 230890, 344236, 430295, 461780, 860590, 946649, 1721180, 1893298, 3786596, 4733245, 9466490, 18932980]

約数ペア:

[(1, 18932980), (2, 9466490), (4, 4733245), (5, 3786596), (10, 1893298), (11, 1721180), (20, 946649), (22, 860590), (41, 461780), (44, 430295), (55, 344236), (82, 230890), (110, 172118), (164, 115445), (205, 92356), (220, 86059), (410, 46178), (451, 41980), (820, 23089), (902, 20990), (1804, 10495), (2099, 9020), (2255, 8396), (4198, 4510)]