21328165

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{461}}^1\times {\mathrm{487}}^1$

素因数の和:972

約数の個数: 16

約数和(自身を含む): 27054720

約数和(自身を除く): 5726555

約数列:

[1, 5, 19, 95, 461, 487, 2305, 2435, 8759, 9253, 43795, 46265, 224507, 1122535, 4265633, 21328165]

約数ペア:

[(1, 21328165), (5, 4265633), (19, 1122535), (95, 224507), (461, 46265), (487, 43795), (2305, 9253), (2435, 8759)]