20909020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{941}}^1$

素因数の和:1062

約数の個数: 48

約数和(自身を含む): 48426336

約数和(自身を除く): 27517316

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 941, 1010, 1111, 1882, 2020, 2222, 3764, 4444, 4705, 5555, 9410, 10351, 11110, 18820, 20702, 22220, 41404, 51755, 95041, 103510, 190082, 207020, 380164, 475205, 950410, 1045451, 1900820, 2090902, 4181804, 5227255, 10454510, 20909020]

約数ペア:

[(1, 20909020), (2, 10454510), (4, 5227255), (5, 4181804), (10, 2090902), (11, 1900820), (20, 1045451), (22, 950410), (44, 475205), (55, 380164), (101, 207020), (110, 190082), (202, 103510), (220, 95041), (404, 51755), (505, 41404), (941, 22220), (1010, 20702), (1111, 18820), (1882, 11110), (2020, 10351), (2222, 9410), (3764, 5555), (4444, 4705)]