19979005

素因数分解:

$5^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1\times {\mathrm{431}}^1$

素因数の和:636

約数の個数: 16

約数和(自身を含む): 24551424

約数和(自身を除く): 4572419

約数列:

[1, 5, 73, 127, 365, 431, 635, 2155, 9271, 31463, 46355, 54737, 157315, 273685, 3995801, 19979005]

約数ペア:

[(1, 19979005), (5, 3995801), (73, 273685), (127, 157315), (365, 54737), (431, 46355), (635, 31463), (2155, 9271)]