128304560

素因数分解:

$2^4\times 5^1\times {\mathrm{1603807}}^1$

素因数の和:1603820

約数の個数: 20

約数和(自身を含む): 298308288

約数和(自身を除く): 170003728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1603807, 3207614, 6415228, 8019035, 12830456, 16038070, 25660912, 32076140, 64152280, 128304560]

約数ペア:

[(1, 128304560), (2, 64152280), (4, 32076140), (5, 25660912), (8, 16038070), (10, 12830456), (16, 8019035), (20, 6415228), (40, 3207614), (80, 1603807)]