128966800

素因数分解:

$2^4\times 5^2\times {\mathrm{322417}}^1$

素因数の和:322435

約数の個数: 30

約数和(自身を含む): 309843698

約数和(自身を除く): 180876898

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 322417, 644834, 1289668, 1612085, 2579336, 3224170, 5158672, 6448340, 8060425, 12896680, 16120850, 25793360, 32241700, 64483400, 128966800]

約数ペア:

[(1, 128966800), (2, 64483400), (4, 32241700), (5, 25793360), (8, 16120850), (10, 12896680), (16, 8060425), (20, 6448340), (25, 5158672), (40, 3224170), (50, 2579336), (80, 1612085), (100, 1289668), (200, 644834), (400, 322417)]