128575400

素因数分解:

$2^3\times 5^2\times {\mathrm{642877}}^1$

素因数の和:642893

約数の個数: 24

約数和(自身を含む): 298938270

約数和(自身を除く): 170362870

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 642877, 1285754, 2571508, 3214385, 5143016, 6428770, 12857540, 16071925, 25715080, 32143850, 64287700, 128575400]

約数ペア:

[(1, 128575400), (2, 64287700), (4, 32143850), (5, 25715080), (8, 16071925), (10, 12857540), (20, 6428770), (25, 5143016), (40, 3214385), (50, 2571508), (100, 1285754), (200, 642877)]