21986480

素因数分解:

$2^4\times 5^1\times {\mathrm{274831}}^1$

素因数の和:274844

約数の個数: 20

約数和(自身を含む): 51118752

約数和(自身を除く): 29132272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274831, 549662, 1099324, 1374155, 2198648, 2748310, 4397296, 5496620, 10993240, 21986480]

約数ペア:

[(1, 21986480), (2, 10993240), (4, 5496620), (5, 4397296), (8, 2748310), (10, 2198648), (16, 1374155), (20, 1099324), (40, 549662), (80, 274831)]