21089979

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{307}}^1\times {\mathrm{449}}^1$

素因数の和:779

約数の個数: 24

約数和(自身を含む): 32432400

約数和(自身を除く): 11342421

約数列:

[1, 3, 9, 17, 51, 153, 307, 449, 921, 1347, 2763, 4041, 5219, 7633, 15657, 22899, 46971, 68697, 137843, 413529, 1240587, 2343331, 7029993, 21089979]

約数ペア:

[(1, 21089979), (3, 7029993), (9, 2343331), (17, 1240587), (51, 413529), (153, 137843), (307, 68697), (449, 46971), (921, 22899), (1347, 15657), (2763, 7633), (4041, 5219)]