21986320

素因数分解:

$2^4\times 5^1\times {\mathrm{274829}}^1$

素因数の和:274842

約数の個数: 20

約数和(自身を含む): 51118380

約数和(自身を除く): 29132060

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274829, 549658, 1099316, 1374145, 2198632, 2748290, 4397264, 5496580, 10993160, 21986320]

約数ペア:

[(1, 21986320), (2, 10993160), (4, 5496580), (5, 4397264), (8, 2748290), (10, 2198632), (16, 1374145), (20, 1099316), (40, 549658), (80, 274829)]