21840005

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{479}}^1\times {\mathrm{829}}^1$

素因数の和:1324

約数の個数: 16

約数和(自身を含む): 28684800

約数和(自身を除く): 6844795

約数列:

[1, 5, 11, 55, 479, 829, 2395, 4145, 5269, 9119, 26345, 45595, 397091, 1985455, 4368001, 21840005]

約数ペア:

[(1, 21840005), (5, 4368001), (11, 1985455), (55, 397091), (479, 45595), (829, 26345), (2395, 9119), (4145, 5269)]