21840161

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{271}}^1\times {\mathrm{397}}^1$

素因数の和:704

約数の個数: 16

約数和(自身を含む): 25981440

約数和(自身を除く): 4141279

約数列:

[1, 7, 29, 203, 271, 397, 1897, 2779, 7859, 11513, 55013, 80591, 107587, 753109, 3120023, 21840161]

約数ペア:

[(1, 21840161), (7, 3120023), (29, 753109), (203, 107587), (271, 80591), (397, 55013), (1897, 11513), (2779, 7859)]