21420260

素因数分解:

$2^2\times 5^1\times {\mathrm{971}}^1\times {\mathrm{1103}}^1$

素因数の和:2083

約数の個数: 24

約数和(自身を含む): 45069696

約数和(自身を除く): 23649436

約数列:

[1, 2, 4, 5, 10, 20, 971, 1103, 1942, 2206, 3884, 4412, 4855, 5515, 9710, 11030, 19420, 22060, 1071013, 2142026, 4284052, 5355065, 10710130, 21420260]

約数ペア:

[(1, 21420260), (2, 10710130), (4, 5355065), (5, 4284052), (10, 2142026), (20, 1071013), (971, 22060), (1103, 19420), (1942, 11030), (2206, 9710), (3884, 5515), (4412, 4855)]