102720400

素因数分解:

$2^4\times 5^2\times {\mathrm{256801}}^1$

素因数の和:256819

約数の個数: 30

約数和(自身を含む): 246786722

約数和(自身を除く): 144066322

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 256801, 513602, 1027204, 1284005, 2054408, 2568010, 4108816, 5136020, 6420025, 10272040, 12840050, 20544080, 25680100, 51360200, 102720400]

約数ペア:

[(1, 102720400), (2, 51360200), (4, 25680100), (5, 20544080), (8, 12840050), (10, 10272040), (16, 6420025), (20, 5136020), (25, 4108816), (40, 2568010), (50, 2054408), (80, 1284005), (100, 1027204), (200, 513602), (400, 256801)]