18979664

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{107839}}^1$

素因数の和:107858

約数の個数: 20

約数和(自身を含む): 40116480

約数和(自身を除く): 21136816

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 107839, 215678, 431356, 862712, 1186229, 1725424, 2372458, 4744916, 9489832, 18979664]

約数ペア:

[(1, 18979664), (2, 9489832), (4, 4744916), (8, 2372458), (11, 1725424), (16, 1186229), (22, 862712), (44, 431356), (88, 215678), (176, 107839)]