21380804

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{197}}^1\times {\mathrm{631}}^1$

素因数の和:875

約数の個数: 24

約数和(自身を含む): 38541888

約数和(自身を除く): 17161084

約数列:

[1, 2, 4, 43, 86, 172, 197, 394, 631, 788, 1262, 2524, 8471, 16942, 27133, 33884, 54266, 108532, 124307, 248614, 497228, 5345201, 10690402, 21380804]

約数ペア:

[(1, 21380804), (2, 10690402), (4, 5345201), (43, 497228), (86, 248614), (172, 124307), (197, 108532), (394, 54266), (631, 33884), (788, 27133), (1262, 16942), (2524, 8471)]