21105740

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{3923}}^1$

素因数の和:4201

約数の個数: 24

約数和(自身を含む): 44498160

約数和(自身を除く): 23392420

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 3923, 5380, 7846, 15692, 19615, 39230, 78460, 1055287, 2110574, 4221148, 5276435, 10552870, 21105740]

約数ペア:

[(1, 21105740), (2, 10552870), (4, 5276435), (5, 4221148), (10, 2110574), (20, 1055287), (269, 78460), (538, 39230), (1076, 19615), (1345, 15692), (2690, 7846), (3923, 5380)]