21276999

素因数分解:

$3^4\times {\mathrm{347}}^1\times {\mathrm{757}}^1$

素因数の和:1116

約数の個数: 20

約数和(自身を含む): 31917864

約数和(自身を除く): 10640865

約数列:

[1, 3, 9, 27, 81, 347, 757, 1041, 2271, 3123, 6813, 9369, 20439, 28107, 61317, 262679, 788037, 2364111, 7092333, 21276999]

約数ペア:

[(1, 21276999), (3, 7092333), (9, 2364111), (27, 788037), (81, 262679), (347, 61317), (757, 28107), (1041, 20439), (2271, 9369), (3123, 6813)]