21388899

素因数分解:

$3^1\times 7^1\times {\mathrm{937}}^1\times {\mathrm{1087}}^1$

素因数の和:2034

約数の個数: 16

約数和(自身を含む): 32657408

約数和(自身を除く): 11268509

約数列:

[1, 3, 7, 21, 937, 1087, 2811, 3261, 6559, 7609, 19677, 22827, 1018519, 3055557, 7129633, 21388899]

約数ペア:

[(1, 21388899), (3, 7129633), (7, 3055557), (21, 1018519), (937, 22827), (1087, 19677), (2811, 7609), (3261, 6559)]