21618040

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{5351}}^1$

素因数の和:5463

約数の個数: 32

約数和(自身を含む): 49131360

約数和(自身を除く): 27513320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 5351, 10702, 21404, 26755, 42808, 53510, 107020, 214040, 540451, 1080902, 2161804, 2702255, 4323608, 5404510, 10809020, 21618040]

約数ペア:

[(1, 21618040), (2, 10809020), (4, 5404510), (5, 4323608), (8, 2702255), (10, 2161804), (20, 1080902), (40, 540451), (101, 214040), (202, 107020), (404, 53510), (505, 42808), (808, 26755), (1010, 21404), (2020, 10702), (4040, 5351)]