21399831

素因数分解:

$3^2\times {\mathrm{59}}^1\times {\mathrm{191}}^1\times {\mathrm{211}}^1$

素因数の和:467

約数の個数: 24

約数和(自身を含む): 31749120

約数和(自身を除く): 10349289

約数列:

[1, 3, 9, 59, 177, 191, 211, 531, 573, 633, 1719, 1899, 11269, 12449, 33807, 37347, 40301, 101421, 112041, 120903, 362709, 2377759, 7133277, 21399831]

約数ペア:

[(1, 21399831), (3, 7133277), (9, 2377759), (59, 362709), (177, 120903), (191, 112041), (211, 101421), (531, 40301), (573, 37347), (633, 33807), (1719, 12449), (1899, 11269)]