20909181

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{1667}}^1$

素因数の和:1820

約数の個数: 16

約数和(自身を含む): 28903104

約数和(自身を除く): 7993923

約数列:

[1, 3, 37, 111, 113, 339, 1667, 4181, 5001, 12543, 61679, 185037, 188371, 565113, 6969727, 20909181]

約数ペア:

[(1, 20909181), (3, 6969727), (37, 565113), (111, 188371), (113, 185037), (339, 61679), (1667, 12543), (4181, 5001)]