21425825

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1049}}^1$

素因数の和:1121

約数の個数: 24

約数和(自身を含む): 28644000

約数和(自身を除く): 7218175

約数列:

[1, 5, 19, 25, 43, 95, 215, 475, 817, 1049, 1075, 4085, 5245, 19931, 20425, 26225, 45107, 99655, 225535, 498275, 857033, 1127675, 4285165, 21425825]

約数ペア:

[(1, 21425825), (5, 4285165), (19, 1127675), (25, 857033), (43, 498275), (95, 225535), (215, 99655), (475, 45107), (817, 26225), (1049, 20425), (1075, 19931), (4085, 5245)]