21085840

素因数分解:

$2^4\times 5^1\times {\mathrm{263573}}^1$

素因数の和:263586

約数の個数: 20

約数和(自身を含む): 49024764

約数和(自身を除く): 27938924

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263573, 527146, 1054292, 1317865, 2108584, 2635730, 4217168, 5271460, 10542920, 21085840]

約数ペア:

[(1, 21085840), (2, 10542920), (4, 5271460), (5, 4217168), (8, 2635730), (10, 2108584), (16, 1317865), (20, 1054292), (40, 527146), (80, 263573)]