85578820

素因数分解:

$2^2\times 5^1\times {\mathrm{4278941}}^1$

素因数の和:4278950

約数の個数: 12

約数和(自身を含む): 179715564

約数和(自身を除く): 94136744

約数列:

[1, 2, 4, 5, 10, 20, 4278941, 8557882, 17115764, 21394705, 42789410, 85578820]

約数ペア:

[(1, 85578820), (2, 42789410), (4, 21394705), (5, 17115764), (10, 8557882), (20, 4278941)]