18915020

素因数分解:

$2^2\times 5^1\times {\mathrm{311}}^1\times {\mathrm{3041}}^1$

素因数の和:3361

約数の個数: 24

約数和(自身を含む): 39862368

約数和(自身を除く): 20947348

約数列:

[1, 2, 4, 5, 10, 20, 311, 622, 1244, 1555, 3041, 3110, 6082, 6220, 12164, 15205, 30410, 60820, 945751, 1891502, 3783004, 4728755, 9457510, 18915020]

約数ペア:

[(1, 18915020), (2, 9457510), (4, 4728755), (5, 3783004), (10, 1891502), (20, 945751), (311, 60820), (622, 30410), (1244, 15205), (1555, 12164), (3041, 6220), (3110, 6082)]