21356540

素因数分解:

$2^2\times 5^1\times {\mathrm{229}}^1\times {\mathrm{4663}}^1$

素因数の和:4901

約数の個数: 24

約数和(自身を含む): 45054240

約数和(自身を除く): 23697700

約数列:

[1, 2, 4, 5, 10, 20, 229, 458, 916, 1145, 2290, 4580, 4663, 9326, 18652, 23315, 46630, 93260, 1067827, 2135654, 4271308, 5339135, 10678270, 21356540]

約数ペア:

[(1, 21356540), (2, 10678270), (4, 5339135), (5, 4271308), (10, 2135654), (20, 1067827), (229, 93260), (458, 46630), (916, 23315), (1145, 18652), (2290, 9326), (4580, 4663)]