20720907

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{547}}^1$

素因数の和:640

約数の個数: 32

約数和(自身を含む): 32616960

約数和(自身を除く): 11896053

約数列:

[1, 3, 9, 23, 27, 61, 69, 183, 207, 547, 549, 621, 1403, 1641, 1647, 4209, 4923, 12581, 12627, 14769, 33367, 37743, 37881, 100101, 113229, 300303, 339687, 767441, 900909, 2302323, 6906969, 20720907]

約数ペア:

[(1, 20720907), (3, 6906969), (9, 2302323), (23, 900909), (27, 767441), (61, 339687), (69, 300303), (183, 113229), (207, 100101), (547, 37881), (549, 37743), (621, 33367), (1403, 14769), (1641, 12627), (1647, 12581), (4209, 4923)]