505520020

素因数分解:

$2^2\times 5^1\times {\mathrm{1289}}^1\times {\mathrm{19609}}^1$

素因数の和:20907

約数の個数: 24

約数和(自身を含む): 1062469800

約数和(自身を除く): 556949780

約数列:

[1, 2, 4, 5, 10, 20, 1289, 2578, 5156, 6445, 12890, 19609, 25780, 39218, 78436, 98045, 196090, 392180, 25276001, 50552002, 101104004, 126380005, 252760010, 505520020]

約数ペア:

[(1, 505520020), (2, 252760010), (4, 126380005), (5, 101104004), (10, 50552002), (20, 25276001), (1289, 392180), (2578, 196090), (5156, 98045), (6445, 78436), (12890, 39218), (19609, 25780)]