21338276

素因数分解:

$2^2\times {\mathrm{109}}^2\times {\mathrm{449}}^1$

素因数の和:671

約数の個数: 18

約数和(自身を含む): 37771650

約数和(自身を除く): 16433374

約数列:

[1, 2, 4, 109, 218, 436, 449, 898, 1796, 11881, 23762, 47524, 48941, 97882, 195764, 5334569, 10669138, 21338276]

約数ペア:

[(1, 21338276), (2, 10669138), (4, 5334569), (109, 195764), (218, 97882), (436, 48941), (449, 47524), (898, 23762), (1796, 11881)]