81081400

素因数分解:

$2^3\times 5^2\times {\mathrm{405407}}^1$

素因数の和:405423

約数の個数: 24

約数和(自身を含む): 188514720

約数和(自身を除く): 107433320

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 405407, 810814, 1621628, 2027035, 3243256, 4054070, 8108140, 10135175, 16216280, 20270350, 40540700, 81081400]

約数ペア:

[(1, 81081400), (2, 40540700), (4, 20270350), (5, 16216280), (8, 10135175), (10, 8108140), (20, 4054070), (25, 3243256), (40, 2027035), (50, 1621628), (100, 810814), (200, 405407)]