21679568

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{31511}}^1$

素因数の和:31562

約数の個数: 20

約数和(自身を含む): 42982368

約数和(自身を除く): 21302800

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 31511, 63022, 126044, 252088, 504176, 1354973, 2709946, 5419892, 10839784, 21679568]

約数ペア:

[(1, 21679568), (2, 10839784), (4, 5419892), (8, 2709946), (16, 1354973), (43, 504176), (86, 252088), (172, 126044), (344, 63022), (688, 31511)]