21904421

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{40639}}^1$

素因数の和:40664

約数の個数: 12

約数和(自身を含む): 27797760

約数和(自身を除く): 5893339

約数列:

[1, 7, 11, 49, 77, 539, 40639, 284473, 447029, 1991311, 3129203, 21904421]

約数ペア:

[(1, 21904421), (7, 3129203), (11, 1991311), (49, 447029), (77, 284473), (539, 40639)]