21538953

素因数分解:

$3^4\times {\mathrm{59}}^1\times {\mathrm{4507}}^1$

素因数の和:4578

約数の個数: 20

約数和(自身を含む): 32728080

約数和(自身を除く): 11189127

約数列:

[1, 3, 9, 27, 59, 81, 177, 531, 1593, 4507, 4779, 13521, 40563, 121689, 265913, 365067, 797739, 2393217, 7179651, 21538953]

約数ペア:

[(1, 21538953), (3, 7179651), (9, 2393217), (27, 797739), (59, 365067), (81, 265913), (177, 121689), (531, 40563), (1593, 13521), (4507, 4779)]