19799890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{179999}}^1$

素因数の和:180017

約数の個数: 16

約数和(自身を含む): 38880000

約数和(自身を除く): 19080110

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 179999, 359998, 899995, 1799990, 1979989, 3959978, 9899945, 19799890]

約数ペア:

[(1, 19799890), (2, 9899945), (5, 3959978), (10, 1979989), (11, 1799990), (22, 899995), (55, 359998), (110, 179999)]