28368220

素因数分解:

$2^2\times 5^1\times {\mathrm{1109}}^1\times {\mathrm{1279}}^1$

素因数の和:2397

約数の個数: 24

約数和(自身を含む): 59673600

約数和(自身を除く): 31305380

約数列:

[1, 2, 4, 5, 10, 20, 1109, 1279, 2218, 2558, 4436, 5116, 5545, 6395, 11090, 12790, 22180, 25580, 1418411, 2836822, 5673644, 7092055, 14184110, 28368220]

約数ペア:

[(1, 28368220), (2, 14184110), (4, 7092055), (5, 5673644), (10, 2836822), (20, 1418411), (1109, 25580), (1279, 22180), (2218, 12790), (2558, 11090), (4436, 6395), (5116, 5545)]