21985100

素因数分解:

$2^2\times 5^2\times {\mathrm{219851}}^1$

素因数の和:219865

約数の個数: 18

約数和(自身を含む): 47707884

約数和(自身を除く): 25722784

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 219851, 439702, 879404, 1099255, 2198510, 4397020, 5496275, 10992550, 21985100]

約数ペア:

[(1, 21985100), (2, 10992550), (4, 5496275), (5, 4397020), (10, 2198510), (20, 1099255), (25, 879404), (50, 439702), (100, 219851)]