8439280

素因数分解:

$2^4\times 5^1\times {\mathrm{105491}}^1$

素因数の和:105504

約数の個数: 20

約数和(自身を含む): 19621512

約数和(自身を除く): 11182232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 105491, 210982, 421964, 527455, 843928, 1054910, 1687856, 2109820, 4219640, 8439280]

約数ペア:

[(1, 8439280), (2, 4219640), (4, 2109820), (5, 1687856), (8, 1054910), (10, 843928), (16, 527455), (20, 421964), (40, 210982), (80, 105491)]