21739347

素因数分解:

$3^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1667}}^1$

素因数の和:1709

約数の個数: 40

約数和(自身を含む): 38750976

約数和(自身を除く): 17011629

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 81, 161, 189, 207, 483, 567, 621, 1449, 1667, 1863, 4347, 5001, 11669, 13041, 15003, 35007, 38341, 45009, 105021, 115023, 135027, 268387, 315063, 345069, 805161, 945189, 1035207, 2415483, 3105621, 7246449, 21739347]

約数ペア:

[(1, 21739347), (3, 7246449), (7, 3105621), (9, 2415483), (21, 1035207), (23, 945189), (27, 805161), (63, 345069), (69, 315063), (81, 268387), (161, 135027), (189, 115023), (207, 105021), (483, 45009), (567, 38341), (621, 35007), (1449, 15003), (1667, 13041), (1863, 11669), (4347, 5001)]