21666040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1201}}^1$

素因数の和:1264

約数の個数: 64

約数和(自身を含む): 54522720

約数和(自身を除く): 32856680

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, 1201, 1640, 1804, 2255, 2402, 3608, 4510, 4804, 6005, 9020, 9608, 12010, 13211, 18040, 24020, 26422, 48040, 49241, 52844, 66055, 98482, 105688, 132110, 196964, 246205, 264220, 393928, 492410, 528440, 541651, 984820, 1083302, 1969640, 2166604, 2708255, 4333208, 5416510, 10833020, 21666040]

約数ペア:

[(1, 21666040), (2, 10833020), (4, 5416510), (5, 4333208), (8, 2708255), (10, 2166604), (11, 1969640), (20, 1083302), (22, 984820), (40, 541651), (41, 528440), (44, 492410), (55, 393928), (82, 264220), (88, 246205), (110, 196964), (164, 132110), (205, 105688), (220, 98482), (328, 66055), (410, 52844), (440, 49241), (451, 48040), (820, 26422), (902, 24020), (1201, 18040), (1640, 13211), (1804, 12010), (2255, 9608), (2402, 9020), (3608, 6005), (4510, 4804)]