19968080

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{22691}}^1$

素因数の和:22715

約数の個数: 40

約数和(自身を含む): 50648544

約数和(自身を除く): 30680464

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 22691, 45382, 90764, 113455, 181528, 226910, 249601, 363056, 453820, 499202, 907640, 998404, 1248005, 1815280, 1996808, 2496010, 3993616, 4992020, 9984040, 19968080]

約数ペア:

[(1, 19968080), (2, 9984040), (4, 4992020), (5, 3993616), (8, 2496010), (10, 1996808), (11, 1815280), (16, 1248005), (20, 998404), (22, 907640), (40, 499202), (44, 453820), (55, 363056), (80, 249601), (88, 226910), (110, 181528), (176, 113455), (220, 90764), (440, 45382), (880, 22691)]