398062220

素因数分解:

$2^2\times 5^1\times {\mathrm{997}}^1\times {\mathrm{19963}}^1$

素因数の和:20969

約数の個数: 24

約数和(自身を含む): 836811024

約数和(自身を除く): 438748804

約数列:

[1, 2, 4, 5, 10, 20, 997, 1994, 3988, 4985, 9970, 19940, 19963, 39926, 79852, 99815, 199630, 399260, 19903111, 39806222, 79612444, 99515555, 199031110, 398062220]

約数ペア:

[(1, 398062220), (2, 199031110), (4, 99515555), (5, 79612444), (10, 39806222), (20, 19903111), (997, 399260), (1994, 199630), (3988, 99815), (4985, 79852), (9970, 39926), (19940, 19963)]