21220400

素因数分解:

$2^4\times 5^2\times {\mathrm{53051}}^1$

素因数の和:53069

約数の個数: 30

約数和(自身を含む): 50982972

約数和(自身を除く): 29762572

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 53051, 106102, 212204, 265255, 424408, 530510, 848816, 1061020, 1326275, 2122040, 2652550, 4244080, 5305100, 10610200, 21220400]

約数ペア:

[(1, 21220400), (2, 10610200), (4, 5305100), (5, 4244080), (8, 2652550), (10, 2122040), (16, 1326275), (20, 1061020), (25, 848816), (40, 530510), (50, 424408), (80, 265255), (100, 212204), (200, 106102), (400, 53051)]