21661940

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26417}}^1$

素因数の和:26467

約数の個数: 24

約数和(自身を含む): 46601352

約数和(自身を除く): 24939412

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26417, 52834, 105668, 132085, 264170, 528340, 1083097, 2166194, 4332388, 5415485, 10830970, 21661940]

約数ペア:

[(1, 21661940), (2, 10830970), (4, 5415485), (5, 4332388), (10, 2166194), (20, 1083097), (41, 528340), (82, 264170), (164, 132085), (205, 105668), (410, 52834), (820, 26417)]