21807981

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{62131}}^1$

素因数の和:62153

約数の個数: 16

約数和(自身を含む): 34793920

約数和(自身を除く): 12985939

約数列:

[1, 3, 9, 13, 27, 39, 117, 351, 62131, 186393, 559179, 807703, 1677537, 2423109, 7269327, 21807981]

約数ペア:

[(1, 21807981), (3, 7269327), (9, 2423109), (13, 1677537), (27, 807703), (39, 559179), (117, 186393), (351, 62131)]