19747664

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{28703}}^1$

素因数の和:28754

約数の個数: 20

約数和(自身を含む): 39152256

約数和(自身を除く): 19404592

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 28703, 57406, 114812, 229624, 459248, 1234229, 2468458, 4936916, 9873832, 19747664]

約数ペア:

[(1, 19747664), (2, 9873832), (4, 4936916), (8, 2468458), (16, 1234229), (43, 459248), (86, 229624), (172, 114812), (344, 57406), (688, 28703)]