51232880

素因数分解:

$2^4\times 5^1\times {\mathrm{640411}}^1$

素因数の和:640424

約数の個数: 20

約数和(自身を含む): 119116632

約数和(自身を除く): 67883752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 640411, 1280822, 2561644, 3202055, 5123288, 6404110, 10246576, 12808220, 25616440, 51232880]

約数ペア:

[(1, 51232880), (2, 25616440), (4, 12808220), (5, 10246576), (8, 6404110), (10, 5123288), (16, 3202055), (20, 2561644), (40, 1280822), (80, 640411)]