18901840

素因数分解:

$2^4\times 5^1\times {\mathrm{349}}^1\times {\mathrm{677}}^1$

素因数の和:1039

約数の個数: 40

約数和(自身を含む): 44137800

約数和(自身を除く): 25235960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 349, 677, 698, 1354, 1396, 1745, 2708, 2792, 3385, 3490, 5416, 5584, 6770, 6980, 10832, 13540, 13960, 27080, 27920, 54160, 236273, 472546, 945092, 1181365, 1890184, 2362730, 3780368, 4725460, 9450920, 18901840]

約数ペア:

[(1, 18901840), (2, 9450920), (4, 4725460), (5, 3780368), (8, 2362730), (10, 1890184), (16, 1181365), (20, 945092), (40, 472546), (80, 236273), (349, 54160), (677, 27920), (698, 27080), (1354, 13960), (1396, 13540), (1745, 10832), (2708, 6980), (2792, 6770), (3385, 5584), (3490, 5416)]