280900

素因数分解:

$2^2\times 5^2\times {\mathrm{53}}^2$

素因数の和:120

約数の個数: 27

約数和(自身を含む): 621271

約数和(自身を除く): 340371

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 53, 100, 106, 212, 265, 530, 1060, 1325, 2650, 2809, 5300, 5618, 11236, 14045, 28090, 56180, 70225, 140450, 280900]

約数ペア:

[(1, 280900), (2, 140450), (4, 70225), (5, 56180), (10, 28090), (20, 14045), (25, 11236), (50, 5618), (53, 5300), (100, 2809), (106, 2650), (212, 1325), (265, 1060)]