1990105

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1801}}^1$

素因数の和:1836

約数の個数: 16

約数和(自身を含む): 2724624

約数和(自身を除く): 734519

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 1801, 9005, 23413, 30617, 117065, 153085, 398021, 1990105]

約数ペア:

[(1, 1990105), (5, 398021), (13, 153085), (17, 117065), (65, 30617), (85, 23413), (221, 9005), (1105, 1801)]