21559984

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{70921}}^1$

素因数の和:70948

約数の個数: 20

約数和(自身を含む): 43971640

約数和(自身を除く): 22411656

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 70921, 141842, 283684, 567368, 1134736, 1347499, 2694998, 5389996, 10779992, 21559984]

約数ペア:

[(1, 21559984), (2, 10779992), (4, 5389996), (8, 2694998), (16, 1347499), (19, 1134736), (38, 567368), (76, 283684), (152, 141842), (304, 70921)]