128821456

素因数分解:

$2^4\times {\mathrm{199}}^1\times {\mathrm{40459}}^1$

素因数の和:40666

約数の個数: 20

約数和(自身を含む): 250852000

約数和(自身を除く): 122030544

約数列:

[1, 2, 4, 8, 16, 199, 398, 796, 1592, 3184, 40459, 80918, 161836, 323672, 647344, 8051341, 16102682, 32205364, 64410728, 128821456]

約数ペア:

[(1, 128821456), (2, 64410728), (4, 32205364), (8, 16102682), (16, 8051341), (199, 647344), (398, 323672), (796, 161836), (1592, 80918), (3184, 40459)]