21900991

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{19433}}^1$

素因数の和:19470

約数の個数: 12

約数和(自身を含む): 26585712

約数和(自身を除く): 4684721

約数列:

[1, 7, 23, 49, 161, 1127, 19433, 136031, 446959, 952217, 3128713, 21900991]

約数ペア:

[(1, 21900991), (7, 3128713), (23, 952217), (49, 446959), (161, 136031), (1127, 19433)]