21272390

素因数分解:

$2^1\times 5^1\times {\mathrm{479}}^1\times {\mathrm{4441}}^1$

素因数の和:4927

約数の個数: 16

約数和(自身を含む): 38378880

約数和(自身を除く): 17106490

約数列:

[1, 2, 5, 10, 479, 958, 2395, 4441, 4790, 8882, 22205, 44410, 2127239, 4254478, 10636195, 21272390]

約数ペア:

[(1, 21272390), (2, 10636195), (5, 4254478), (10, 2127239), (479, 44410), (958, 22205), (2395, 8882), (4441, 4790)]