21440553

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{3929}}^1$

素因数の和:4056

約数の個数: 16

約数和(自身を含む): 30559680

約数和(自身を除く): 9119127

約数列:

[1, 3, 17, 51, 107, 321, 1819, 3929, 5457, 11787, 66793, 200379, 420403, 1261209, 7146851, 21440553]

約数ペア:

[(1, 21440553), (3, 7146851), (17, 1261209), (51, 420403), (107, 200379), (321, 66793), (1819, 11787), (3929, 5457)]