21987231

素因数分解:

$3^1\times 7^2\times {\mathrm{373}}^1\times {\mathrm{401}}^1$

素因数の和:791

約数の個数: 24

約数和(自身を含む): 34279344

約数和(自身を除く): 12292113

約数列:

[1, 3, 7, 21, 49, 147, 373, 401, 1119, 1203, 2611, 2807, 7833, 8421, 18277, 19649, 54831, 58947, 149573, 448719, 1047011, 3141033, 7329077, 21987231]

約数ペア:

[(1, 21987231), (3, 7329077), (7, 3141033), (21, 1047011), (49, 448719), (147, 149573), (373, 58947), (401, 54831), (1119, 19649), (1203, 18277), (2611, 8421), (2807, 7833)]