21420208

素因数分解:

$2^4\times {\mathrm{487}}^1\times {\mathrm{2749}}^1$

素因数の和:3244

約数の個数: 20

約数和(自身を含む): 41602000

約数和(自身を除く): 20181792

約数列:

[1, 2, 4, 8, 16, 487, 974, 1948, 2749, 3896, 5498, 7792, 10996, 21992, 43984, 1338763, 2677526, 5355052, 10710104, 21420208]

約数ペア:

[(1, 21420208), (2, 10710104), (4, 5355052), (8, 2677526), (16, 1338763), (487, 43984), (974, 21992), (1948, 10996), (2749, 7792), (3896, 5498)]