21128954

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{137201}}^1$

素因数の和:137221

約数の個数: 16

約数和(自身を含む): 39514176

約数和(自身を除く): 18385222

約数列:

[1, 2, 7, 11, 14, 22, 77, 154, 137201, 274402, 960407, 1509211, 1920814, 3018422, 10564477, 21128954]

約数ペア:

[(1, 21128954), (2, 10564477), (7, 3018422), (11, 1920814), (14, 1509211), (22, 960407), (77, 274402), (154, 137201)]