21788291

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{19333}}^1$

素因数の和:19370

約数の個数: 12

約数和(自身を含む): 26448912

約数和(自身を除く): 4660621

約数列:

[1, 7, 23, 49, 161, 1127, 19333, 135331, 444659, 947317, 3112613, 21788291]

約数ペア:

[(1, 21788291), (7, 3112613), (23, 947317), (49, 444659), (161, 135331), (1127, 19333)]