21108380

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{4013}}^1$

素因数の和:4285

約数の個数: 24

約数和(自身を含む): 44507232

約数和(自身を除く): 23398852

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 2630, 4013, 5260, 8026, 16052, 20065, 40130, 80260, 1055419, 2110838, 4221676, 5277095, 10554190, 21108380]

約数ペア:

[(1, 21108380), (2, 10554190), (4, 5277095), (5, 4221676), (10, 2110838), (20, 1055419), (263, 80260), (526, 40130), (1052, 20065), (1315, 16052), (2630, 8026), (4013, 5260)]