80864720

素因数分解:

$2^4\times 5^1\times {\mathrm{1010809}}^1$

素因数の和:1010822

約数の個数: 20

約数和(自身を含む): 188010660

約数和(自身を除く): 107145940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1010809, 2021618, 4043236, 5054045, 8086472, 10108090, 16172944, 20216180, 40432360, 80864720]

約数ペア:

[(1, 80864720), (2, 40432360), (4, 20216180), (5, 16172944), (8, 10108090), (10, 8086472), (16, 5054045), (20, 4043236), (40, 2021618), (80, 1010809)]