18915620

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{20123}}^1$

素因数の和:20179

約数の個数: 24

約数和(自身を含む): 40569984

約数和(自身を除く): 21654364

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 20123, 40246, 80492, 100615, 201230, 402460, 945781, 1891562, 3783124, 4728905, 9457810, 18915620]

約数ペア:

[(1, 18915620), (2, 9457810), (4, 4728905), (5, 3783124), (10, 1891562), (20, 945781), (47, 402460), (94, 201230), (188, 100615), (235, 80492), (470, 40246), (940, 20123)]