21807989

素因数分解:

$7^2\times {\mathrm{619}}^1\times {\mathrm{719}}^1$

素因数の和:1352

約数の個数: 12

約数和(自身を含む): 25444800

約数和(自身を除く): 3636811

約数列:

[1, 7, 49, 619, 719, 4333, 5033, 30331, 35231, 445061, 3115427, 21807989]

約数ペア:

[(1, 21807989), (7, 3115427), (49, 445061), (619, 35231), (719, 30331), (4333, 5033)]