21987740

素因数分解:

$2^2\times 5^1\times {\mathrm{433}}^1\times {\mathrm{2539}}^1$

素因数の和:2981

約数の個数: 24

約数和(自身を含む): 46299120

約数和(自身を除く): 24311380

約数列:

[1, 2, 4, 5, 10, 20, 433, 866, 1732, 2165, 2539, 4330, 5078, 8660, 10156, 12695, 25390, 50780, 1099387, 2198774, 4397548, 5496935, 10993870, 21987740]

約数ペア:

[(1, 21987740), (2, 10993870), (4, 5496935), (5, 4397548), (10, 2198774), (20, 1099387), (433, 50780), (866, 25390), (1732, 12695), (2165, 10156), (2539, 8660), (4330, 5078)]