78680020

素因数分解:

$2^2\times 5^1\times {\mathrm{3934001}}^1$

素因数の和:3934010

約数の個数: 12

約数和(自身を含む): 165228084

約数和(自身を除く): 86548064

約数列:

[1, 2, 4, 5, 10, 20, 3934001, 7868002, 15736004, 19670005, 39340010, 78680020]

約数ペア:

[(1, 78680020), (2, 39340010), (4, 19670005), (5, 15736004), (10, 7868002), (20, 3934001)]