21123880

素因数分解:

$2^3\times 5^1\times {\mathrm{528097}}^1$

素因数の和:528108

約数の個数: 16

約数和(自身を含む): 47528820

約数和(自身を除く): 26404940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 528097, 1056194, 2112388, 2640485, 4224776, 5280970, 10561940, 21123880]

約数ペア:

[(1, 21123880), (2, 10561940), (4, 5280970), (5, 4224776), (8, 2640485), (10, 2112388), (20, 1056194), (40, 528097)]