199999780

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{44843}}^1$

素因数の和:45075

約数の個数: 24

約数和(自身を含む): 421892352

約数和(自身を除く): 221892572

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 44843, 89686, 179372, 224215, 448430, 896860, 9999989, 19999978, 39999956, 49999945, 99999890, 199999780]

約数ペア:

[(1, 199999780), (2, 99999890), (4, 49999945), (5, 39999956), (10, 19999978), (20, 9999989), (223, 896860), (446, 448430), (892, 224215), (1115, 179372), (2230, 89686), (4460, 44843)]