21728245

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{56437}}^1$

素因数の和:56460

約数の個数: 16

約数和(自身を含む): 32508288

約数和(自身を除く): 10780043

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 56437, 282185, 395059, 620807, 1975295, 3104035, 4345649, 21728245]

約数ペア:

[(1, 21728245), (5, 4345649), (7, 3104035), (11, 1975295), (35, 620807), (55, 395059), (77, 282185), (385, 56437)]