21890020

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{2069}}^1$

素因数の和:2124

約数の個数: 36

約数和(自身を含む): 48077820

約数和(自身を除く): 26187800

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 529, 1058, 2069, 2116, 2645, 4138, 5290, 8276, 10345, 10580, 20690, 41380, 47587, 95174, 190348, 237935, 475870, 951740, 1094501, 2189002, 4378004, 5472505, 10945010, 21890020]

約数ペア:

[(1, 21890020), (2, 10945010), (4, 5472505), (5, 4378004), (10, 2189002), (20, 1094501), (23, 951740), (46, 475870), (92, 237935), (115, 190348), (230, 95174), (460, 47587), (529, 41380), (1058, 20690), (2069, 10580), (2116, 10345), (2645, 8276), (4138, 5290)]