21257885

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{857}}^1$

素因数の和:925

約数の個数: 24

約数和(自身を含む): 28756728

約数和(自身を除く): 7498843

約数列:

[1, 5, 11, 41, 55, 121, 205, 451, 605, 857, 2255, 4285, 4961, 9427, 24805, 35137, 47135, 103697, 175685, 386507, 518485, 1932535, 4251577, 21257885]

約数ペア:

[(1, 21257885), (5, 4251577), (11, 1932535), (41, 518485), (55, 386507), (121, 175685), (205, 103697), (451, 47135), (605, 35137), (857, 24805), (2255, 9427), (4285, 4961)]