20645236520

素因数分解:

$2^3\times 5^1\times {\mathrm{516130913}}^1$

素因数の和:516130924

約数の個数: 16

約数和(自身を含む): 46451782260

約数和(自身を除く): 25806545740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 516130913, 1032261826, 2064523652, 2580654565, 4129047304, 5161309130, 10322618260, 20645236520]

約数ペア:

[(1, 20645236520), (2, 10322618260), (4, 5161309130), (5, 4129047304), (8, 2580654565), (10, 2064523652), (20, 1032261826), (40, 516130913)]