21571907

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{19141}}^1$

素因数の和:19178

約数の個数: 12

約数和(自身を含む): 26186256

約数和(自身を除く): 4614349

約数列:

[1, 7, 23, 49, 161, 1127, 19141, 133987, 440243, 937909, 3081701, 21571907]

約数ペア:

[(1, 21571907), (7, 3081701), (23, 937909), (49, 440243), (161, 133987), (1127, 19141)]