21000657680

素因数分解:

$2^4\times 5^1\times {\mathrm{262508221}}^1$

素因数の和:262508234

約数の個数: 20

約数和(自身を含む): 48826529292

約数和(自身を除く): 27825871612

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 262508221, 525016442, 1050032884, 1312541105, 2100065768, 2625082210, 4200131536, 5250164420, 10500328840, 21000657680]

約数ペア:

[(1, 21000657680), (2, 10500328840), (4, 5250164420), (5, 4200131536), (8, 2625082210), (10, 2100065768), (16, 1312541105), (20, 1050032884), (40, 525016442), (80, 262508221)]