31981520

素因数分解:

$2^4\times 5^1\times {\mathrm{399769}}^1$

素因数の和:399782

約数の個数: 20

約数和(自身を含む): 74357220

約数和(自身を除く): 42375700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 399769, 799538, 1599076, 1998845, 3198152, 3997690, 6396304, 7995380, 15990760, 31981520]

約数ペア:

[(1, 31981520), (2, 15990760), (4, 7995380), (5, 6396304), (8, 3997690), (10, 3198152), (16, 1998845), (20, 1599076), (40, 799538), (80, 399769)]