21040505

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{241}}^1\times {\mathrm{919}}^1$

素因数の和:1184

約数の個数: 16

約数和(自身を含む): 26716800

約数和(自身を除く): 5676295

約数列:

[1, 5, 19, 95, 241, 919, 1205, 4579, 4595, 17461, 22895, 87305, 221479, 1107395, 4208101, 21040505]

約数ペア:

[(1, 21040505), (5, 4208101), (19, 1107395), (95, 221479), (241, 87305), (919, 22895), (1205, 17461), (4579, 4595)]