21226864

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{30853}}^1$

素因数の和:30904

約数の個数: 20

約数和(自身を含む): 42084856

約数和(自身を除く): 20857992

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 30853, 61706, 123412, 246824, 493648, 1326679, 2653358, 5306716, 10613432, 21226864]

約数ペア:

[(1, 21226864), (2, 10613432), (4, 5306716), (8, 2653358), (16, 1326679), (43, 493648), (86, 246824), (172, 123412), (344, 61706), (688, 30853)]