19821520

素因数分解:

$2^4\times 5^1\times {\mathrm{247769}}^1$

素因数の和:247782

約数の個数: 20

約数和(自身を含む): 46085220

約数和(自身を除く): 26263700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247769, 495538, 991076, 1238845, 1982152, 2477690, 3964304, 4955380, 9910760, 19821520]

約数ペア:

[(1, 19821520), (2, 9910760), (4, 4955380), (5, 3964304), (8, 2477690), (10, 1982152), (16, 1238845), (20, 991076), (40, 495538), (80, 247769)]