78866020

素因数分解:

$2^2\times 5^1\times {\mathrm{3943301}}^1$

素因数の和:3943310

約数の個数: 12

約数和(自身を含む): 165618684

約数和(自身を除く): 86752664

約数列:

[1, 2, 4, 5, 10, 20, 3943301, 7886602, 15773204, 19716505, 39433010, 78866020]

約数ペア:

[(1, 78866020), (2, 39433010), (4, 19716505), (5, 15773204), (10, 7886602), (20, 3943301)]