21661881

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{419}}^1\times {\mathrm{907}}^1$

素因数の和:1348

約数の個数: 16

約数和(自身を含む): 30508800

約数和(自身を除く): 8846919

約数列:

[1, 3, 19, 57, 419, 907, 1257, 2721, 7961, 17233, 23883, 51699, 380033, 1140099, 7220627, 21661881]

約数ペア:

[(1, 21661881), (3, 7220627), (19, 1140099), (57, 380033), (419, 51699), (907, 23883), (1257, 17233), (2721, 7961)]