9978626380

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1941367}}^1$

素因数の和:1941633

約数の個数: 24

約数和(自身を含む): 21036663648

約数和(自身を除く): 11058037268

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 5140, 1941367, 3882734, 7765468, 9706835, 19413670, 38827340, 498931319, 997862638, 1995725276, 2494656595, 4989313190, 9978626380]

約数ペア:

[(1, 9978626380), (2, 4989313190), (4, 2494656595), (5, 1995725276), (10, 997862638), (20, 498931319), (257, 38827340), (514, 19413670), (1028, 9706835), (1285, 7765468), (2570, 3882734), (5140, 1941367)]