128181400

素因数分解:

$2^3\times 5^2\times {\mathrm{640907}}^1$

素因数の和:640923

約数の個数: 24

約数和(自身を含む): 298022220

約数和(自身を除く): 169840820

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 640907, 1281814, 2563628, 3204535, 5127256, 6409070, 12818140, 16022675, 25636280, 32045350, 64090700, 128181400]

約数ペア:

[(1, 128181400), (2, 64090700), (4, 32045350), (5, 25636280), (8, 16022675), (10, 12818140), (20, 6409070), (25, 5127256), (40, 3204535), (50, 2563628), (100, 1281814), (200, 640907)]