20981300

素因数分解:

$2^2\times 5^2\times {\mathrm{209813}}^1$

素因数の和:209827

約数の個数: 18

約数和(自身を含む): 45529638

約数和(自身を除く): 24548338

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 209813, 419626, 839252, 1049065, 2098130, 4196260, 5245325, 10490650, 20981300]

約数ペア:

[(1, 20981300), (2, 10490650), (4, 5245325), (5, 4196260), (10, 2098130), (20, 1049065), (25, 839252), (50, 419626), (100, 209813)]