1279659820

素因数分解:

$2^2\times 5^1\times {\mathrm{63982991}}^1$

素因数の和:63983000

約数の個数: 12

約数和(自身を含む): 2687285664

約数和(自身を除く): 1407625844

約数列:

[1, 2, 4, 5, 10, 20, 63982991, 127965982, 255931964, 319914955, 639829910, 1279659820]

約数ペア:

[(1, 1279659820), (2, 639829910), (4, 319914955), (5, 255931964), (10, 127965982), (20, 63982991)]