18871760

素因数分解:

$2^4\times 5^1\times {\mathrm{419}}^1\times {\mathrm{563}}^1$

素因数の和:995

約数の個数: 40

約数和(自身を含む): 44059680

約数和(自身を除く): 25187920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 419, 563, 838, 1126, 1676, 2095, 2252, 2815, 3352, 4190, 4504, 5630, 6704, 8380, 9008, 11260, 16760, 22520, 33520, 45040, 235897, 471794, 943588, 1179485, 1887176, 2358970, 3774352, 4717940, 9435880, 18871760]

約数ペア:

[(1, 18871760), (2, 9435880), (4, 4717940), (5, 3774352), (8, 2358970), (10, 1887176), (16, 1179485), (20, 943588), (40, 471794), (80, 235897), (419, 45040), (563, 33520), (838, 22520), (1126, 16760), (1676, 11260), (2095, 9008), (2252, 8380), (2815, 6704), (3352, 5630), (4190, 4504)]