21984389

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{19507}}^1$

素因数の和:19544

約数の個数: 12

約数和(自身を含む): 26686944

約数和(自身を除く): 4702555

約数列:

[1, 7, 23, 49, 161, 1127, 19507, 136549, 448661, 955843, 3140627, 21984389]

約数ペア:

[(1, 21984389), (7, 3140627), (23, 955843), (49, 448661), (161, 136549), (1127, 19507)]