21391081

素因数分解:

${\mathrm{23}}^1\times {\mathrm{43}}^2\times {\mathrm{503}}^1$

素因数の和:612

約数の個数: 12

約数和(自身を含む): 22897728

約数和(自身を除く): 1506647

約数列:

[1, 23, 43, 503, 989, 1849, 11569, 21629, 42527, 497467, 930047, 21391081]

約数ペア:

[(1, 21391081), (23, 930047), (43, 497467), (503, 42527), (989, 21629), (1849, 11569)]