19809990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{2137}}^1$

素因数の和:2253

約数の個数: 48

約数和(自身を含む): 52030368

約数和(自身を除く): 32220378

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 103, 206, 309, 515, 618, 927, 1030, 1545, 1854, 2137, 3090, 4274, 4635, 6411, 9270, 10685, 12822, 19233, 21370, 32055, 38466, 64110, 96165, 192330, 220111, 440222, 660333, 1100555, 1320666, 1980999, 2201110, 3301665, 3961998, 6603330, 9904995, 19809990]

約数ペア:

[(1, 19809990), (2, 9904995), (3, 6603330), (5, 3961998), (6, 3301665), (9, 2201110), (10, 1980999), (15, 1320666), (18, 1100555), (30, 660333), (45, 440222), (90, 220111), (103, 192330), (206, 96165), (309, 64110), (515, 38466), (618, 32055), (927, 21370), (1030, 19233), (1545, 12822), (1854, 10685), (2137, 9270), (3090, 6411), (4274, 4635)]