21915481

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{4391}}^1$

素因数の和:4452

約数の個数: 16

約数和(自身を含む): 26984448

約数和(自身を除く): 5068967

約数列:

[1, 7, 23, 31, 161, 217, 713, 4391, 4991, 30737, 100993, 136121, 706951, 952847, 3130783, 21915481]

約数ペア:

[(1, 21915481), (7, 3130783), (23, 952847), (31, 706951), (161, 136121), (217, 100993), (713, 30737), (4391, 4991)]