20128280

素因数分解:

$2^3\times 5^1\times {\mathrm{503207}}^1$

素因数の和:503218

約数の個数: 16

約数和(自身を含む): 45288720

約数和(自身を除く): 25160440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503207, 1006414, 2012828, 2516035, 4025656, 5032070, 10064140, 20128280]

約数ペア:

[(1, 20128280), (2, 10064140), (4, 5032070), (5, 4025656), (8, 2516035), (10, 2012828), (20, 1006414), (40, 503207)]