19797800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{8999}}^1$

素因数の和:9026

約数の個数: 48

約数和(自身を含む): 50220000

約数和(自身を除く): 30422200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 200, 220, 275, 440, 550, 1100, 2200, 8999, 17998, 35996, 44995, 71992, 89990, 98989, 179980, 197978, 224975, 359960, 395956, 449950, 494945, 791912, 899900, 989890, 1799800, 1979780, 2474725, 3959560, 4949450, 9898900, 19797800]

約数ペア:

[(1, 19797800), (2, 9898900), (4, 4949450), (5, 3959560), (8, 2474725), (10, 1979780), (11, 1799800), (20, 989890), (22, 899900), (25, 791912), (40, 494945), (44, 449950), (50, 395956), (55, 359960), (88, 224975), (100, 197978), (110, 179980), (200, 98989), (220, 89990), (275, 71992), (440, 44995), (550, 35996), (1100, 17998), (2200, 8999)]