180640400

素因数分解:

$2^4\times 5^2\times {\mathrm{451601}}^1$

素因数の和:451619

約数の個数: 30

約数和(自身を含む): 433989522

約数和(自身を除く): 253349122

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 451601, 903202, 1806404, 2258005, 3612808, 4516010, 7225616, 9032020, 11290025, 18064040, 22580050, 36128080, 45160100, 90320200, 180640400]

約数ペア:

[(1, 180640400), (2, 90320200), (4, 45160100), (5, 36128080), (8, 22580050), (10, 18064040), (16, 11290025), (20, 9032020), (25, 7225616), (40, 4516010), (50, 3612808), (80, 2258005), (100, 1806404), (200, 903202), (400, 451601)]