318291280

素因数分解:

$2^4\times 5^1\times {\mathrm{3978641}}^1$

素因数の和:3978654

約数の個数: 20

約数和(自身を含む): 740027412

約数和(自身を除く): 421736132

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3978641, 7957282, 15914564, 19893205, 31829128, 39786410, 63658256, 79572820, 159145640, 318291280]

約数ペア:

[(1, 318291280), (2, 159145640), (4, 79572820), (5, 63658256), (8, 39786410), (10, 31829128), (16, 19893205), (20, 15914564), (40, 7957282), (80, 3978641)]