21018933

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{19961}}^1$

素因数の和:19986

約数の個数: 20

約数和(自身を含む): 33815628

約数和(自身を除く): 12796695

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 19961, 59883, 179649, 259493, 538947, 778479, 1616841, 2335437, 7006311, 21018933]

約数ペア:

[(1, 21018933), (3, 7006311), (9, 2335437), (13, 1616841), (27, 778479), (39, 538947), (81, 259493), (117, 179649), (351, 59883), (1053, 19961)]