21578109

素因数分解:

$3^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{3347}}^1$

素因数の和:3664

約数の個数: 16

約数和(自身を含む): 32997888

約数和(自身を除く): 11419779

約数列:

[1, 3, 7, 21, 307, 921, 2149, 3347, 6447, 10041, 23429, 70287, 1027529, 3082587, 7192703, 21578109]

約数ペア:

[(1, 21578109), (3, 7192703), (7, 3082587), (21, 1027529), (307, 70287), (921, 23429), (2149, 10041), (3347, 6447)]