28457840

素因数分解:

$2^4\times 5^1\times {\mathrm{355723}}^1$

素因数の和:355736

約数の個数: 20

約数和(自身を含む): 66164664

約数和(自身を除く): 37706824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 355723, 711446, 1422892, 1778615, 2845784, 3557230, 5691568, 7114460, 14228920, 28457840]

約数ペア:

[(1, 28457840), (2, 14228920), (4, 7114460), (5, 5691568), (8, 3557230), (10, 2845784), (16, 1778615), (20, 1422892), (40, 711446), (80, 355723)]