20478445

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{10163}}^1$

素因数の和:10212

約数の個数: 16

約数和(自身を含む): 27320832

約数和(自身を除く): 6842387

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 10163, 50815, 132119, 315053, 660595, 1575265, 4095689, 20478445]

約数ペア:

[(1, 20478445), (5, 4095689), (13, 1575265), (31, 660595), (65, 315053), (155, 132119), (403, 50815), (2015, 10163)]