21987340

素因数分解:

$2^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{3581}}^1$

素因数の和:3897

約数の個数: 24

約数和(自身を含む): 46336752

約数和(自身を除く): 24349412

約数列:

[1, 2, 4, 5, 10, 20, 307, 614, 1228, 1535, 3070, 3581, 6140, 7162, 14324, 17905, 35810, 71620, 1099367, 2198734, 4397468, 5496835, 10993670, 21987340]

約数ペア:

[(1, 21987340), (2, 10993670), (4, 5496835), (5, 4397468), (10, 2198734), (20, 1099367), (307, 71620), (614, 35810), (1228, 17905), (1535, 14324), (3070, 7162), (3581, 6140)]