19990340

素因数分解:

$2^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{3557}}^1$

素因数の和:3847

約数の個数: 24

約数和(自身を含む): 42140952

約数和(自身を除く): 22150612

約数列:

[1, 2, 4, 5, 10, 20, 281, 562, 1124, 1405, 2810, 3557, 5620, 7114, 14228, 17785, 35570, 71140, 999517, 1999034, 3998068, 4997585, 9995170, 19990340]

約数ペア:

[(1, 19990340), (2, 9995170), (4, 4997585), (5, 3998068), (10, 1999034), (20, 999517), (281, 71140), (562, 35570), (1124, 17785), (1405, 14228), (2810, 7114), (3557, 5620)]