19991680

素因数分解:

$2^7\times 5^1\times {\mathrm{31237}}^1$

素因数の和:31256

約数の個数: 32

約数和(自身を含む): 47794140

約数和(自身を除く): 27802460

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 31237, 62474, 124948, 156185, 249896, 312370, 499792, 624740, 999584, 1249480, 1999168, 2498960, 3998336, 4997920, 9995840, 19991680]

約数ペア:

[(1, 19991680), (2, 9995840), (4, 4997920), (5, 3998336), (8, 2498960), (10, 1999168), (16, 1249480), (20, 999584), (32, 624740), (40, 499792), (64, 312370), (80, 249896), (128, 156185), (160, 124948), (320, 62474), (640, 31237)]