21291213

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{359}}^1\times {\mathrm{373}}^1$

素因数の和:788

約数の個数: 16

約数和(自身を含む): 29082240

約数和(自身を除く): 7791027

約数列:

[1, 3, 53, 159, 359, 373, 1077, 1119, 19027, 19769, 57081, 59307, 133907, 401721, 7097071, 21291213]

約数ペア:

[(1, 21291213), (3, 7097071), (53, 401721), (159, 133907), (359, 59307), (373, 57081), (1077, 19769), (1119, 19027)]