21617780

素因数分解:

$2^2\times 5^1\times {\mathrm{827}}^1\times {\mathrm{1307}}^1$

素因数の和:2143

約数の個数: 24

約数和(自身を含む): 45487008

約数和(自身を除く): 23869228

約数列:

[1, 2, 4, 5, 10, 20, 827, 1307, 1654, 2614, 3308, 4135, 5228, 6535, 8270, 13070, 16540, 26140, 1080889, 2161778, 4323556, 5404445, 10808890, 21617780]

約数ペア:

[(1, 21617780), (2, 10808890), (4, 5404445), (5, 4323556), (10, 2161778), (20, 1080889), (827, 26140), (1307, 16540), (1654, 13070), (2614, 8270), (3308, 6535), (4135, 5228)]