21084721

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1\times {\mathrm{757}}^1$

素因数の和:960

約数の個数: 16

約数和(自身を含む): 25323264

約数和(自身を除く): 4238543

約数列:

[1, 7, 23, 161, 173, 757, 1211, 3979, 5299, 17411, 27853, 121877, 130961, 916727, 3012103, 21084721]

約数ペア:

[(1, 21084721), (7, 3012103), (23, 916727), (161, 130961), (173, 121877), (757, 27853), (1211, 17411), (3979, 5299)]