21745731

素因数分解:

$3^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{3373}}^1$

素因数の和:3690

約数の個数: 16

約数和(自身を含む): 33254144

約数和(自身を除く): 11508413

約数列:

[1, 3, 7, 21, 307, 921, 2149, 3373, 6447, 10119, 23611, 70833, 1035511, 3106533, 7248577, 21745731]

約数ペア:

[(1, 21745731), (3, 7248577), (7, 3106533), (21, 1035511), (307, 70833), (921, 23611), (2149, 10119), (3373, 6447)]