21128176

素因数分解:

$2^4\times {\mathrm{251}}^1\times {\mathrm{5261}}^1$

素因数の和:5520

約数の個数: 20

約数和(自身を含む): 41106744

約数和(自身を除く): 19978568

約数列:

[1, 2, 4, 8, 16, 251, 502, 1004, 2008, 4016, 5261, 10522, 21044, 42088, 84176, 1320511, 2641022, 5282044, 10564088, 21128176]

約数ペア:

[(1, 21128176), (2, 10564088), (4, 5282044), (8, 2641022), (16, 1320511), (251, 84176), (502, 42088), (1004, 21044), (2008, 10522), (4016, 5261)]