8712220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^2$

素因数の和:418

約数の個数: 36

約数和(自身を含む): 20059704

約数和(自身を除く): 11347484

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 796, 995, 1990, 2189, 3980, 4378, 8756, 10945, 21890, 39601, 43780, 79202, 158404, 198005, 396010, 435611, 792020, 871222, 1742444, 2178055, 4356110, 8712220]

約数ペア:

[(1, 8712220), (2, 4356110), (4, 2178055), (5, 1742444), (10, 871222), (11, 792020), (20, 435611), (22, 396010), (44, 198005), (55, 158404), (110, 79202), (199, 43780), (220, 39601), (398, 21890), (796, 10945), (995, 8756), (1990, 4378), (2189, 3980)]