39280

素因数分解:

$2^4\times 5^1\times {\mathrm{491}}^1$

素因数の和:504

約数の個数: 20

約数和(自身を含む): 91512

約数和(自身を除く): 52232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 491, 982, 1964, 2455, 3928, 4910, 7856, 9820, 19640, 39280]

約数ペア:

[(1, 39280), (2, 19640), (4, 9820), (5, 7856), (8, 4910), (10, 3928), (16, 2455), (20, 1964), (40, 982), (80, 491)]