21557104

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{31333}}^1$

素因数の和:31384

約数の個数: 20

約数和(自身を含む): 42739576

約数和(自身を除く): 21182472

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 31333, 62666, 125332, 250664, 501328, 1347319, 2694638, 5389276, 10778552, 21557104]

約数ペア:

[(1, 21557104), (2, 10778552), (4, 5389276), (8, 2694638), (16, 1347319), (43, 501328), (86, 250664), (172, 125332), (344, 62666), (688, 31333)]