20172020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{91691}}^1$

素因数の和:91711

約数の個数: 24

約数和(自身を含む): 46212768

約数和(自身を除く): 26040748

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 91691, 183382, 366764, 458455, 916910, 1008601, 1833820, 2017202, 4034404, 5043005, 10086010, 20172020]

約数ペア:

[(1, 20172020), (2, 10086010), (4, 5043005), (5, 4034404), (10, 2017202), (11, 1833820), (20, 1008601), (22, 916910), (44, 458455), (55, 366764), (110, 183382), (220, 91691)]