21026780

素因数分解:

$2^2\times 5^1\times {\mathrm{229}}^1\times {\mathrm{4591}}^1$

素因数の和:4829

約数の個数: 24

約数和(自身を含む): 44358720

約数和(自身を除く): 23331940

約数列:

[1, 2, 4, 5, 10, 20, 229, 458, 916, 1145, 2290, 4580, 4591, 9182, 18364, 22955, 45910, 91820, 1051339, 2102678, 4205356, 5256695, 10513390, 21026780]

約数ペア:

[(1, 21026780), (2, 10513390), (4, 5256695), (5, 4205356), (10, 2102678), (20, 1051339), (229, 91820), (458, 45910), (916, 22955), (1145, 18364), (2290, 9182), (4580, 4591)]