128945800

素因数分解:

$2^3\times 5^2\times {\mathrm{644729}}^1$

素因数の和:644745

約数の個数: 24

約数和(自身を含む): 299799450

約数和(自身を除く): 170853650

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 644729, 1289458, 2578916, 3223645, 5157832, 6447290, 12894580, 16118225, 25789160, 32236450, 64472900, 128945800]

約数ペア:

[(1, 128945800), (2, 64472900), (4, 32236450), (5, 25789160), (8, 16118225), (10, 12894580), (20, 6447290), (25, 5157832), (40, 3223645), (50, 2578916), (100, 1289458), (200, 644729)]