21015856

素因数分解:

$2^4\times {\mathrm{1019}}^1\times {\mathrm{1289}}^1$

素因数の和:2316

約数の個数: 20

約数和(自身を含む): 40789800

約数和(自身を除く): 19773944

約数列:

[1, 2, 4, 8, 16, 1019, 1289, 2038, 2578, 4076, 5156, 8152, 10312, 16304, 20624, 1313491, 2626982, 5253964, 10507928, 21015856]

約数ペア:

[(1, 21015856), (2, 10507928), (4, 5253964), (8, 2626982), (16, 1313491), (1019, 20624), (1289, 16304), (2038, 10312), (2578, 8152), (4076, 5156)]