20170911920

素因数分解:

$2^4\times 5^1\times {\mathrm{449}}^1\times {\mathrm{561551}}^1$

素因数の和:562013

約数の個数: 40

約数和(自身を含む): 47001902400

約数和(自身を除く): 26830990480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 449, 898, 1796, 2245, 3592, 4490, 7184, 8980, 17960, 35920, 561551, 1123102, 2246204, 2807755, 4492408, 5615510, 8984816, 11231020, 22462040, 44924080, 252136399, 504272798, 1008545596, 1260681995, 2017091192, 2521363990, 4034182384, 5042727980, 10085455960, 20170911920]

約数ペア:

[(1, 20170911920), (2, 10085455960), (4, 5042727980), (5, 4034182384), (8, 2521363990), (10, 2017091192), (16, 1260681995), (20, 1008545596), (40, 504272798), (80, 252136399), (449, 44924080), (898, 22462040), (1796, 11231020), (2245, 8984816), (3592, 5615510), (4490, 4492408), (7184, 2807755), (8980, 2246204), (17960, 1123102), (35920, 561551)]