21655340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{154681}}^1$

素因数の和:154697

約数の個数: 24

約数和(自身を含む): 51973152

約数和(自身を除く): 30317812

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 154681, 309362, 618724, 773405, 1082767, 1546810, 2165534, 3093620, 4331068, 5413835, 10827670, 21655340]

約数ペア:

[(1, 21655340), (2, 10827670), (4, 5413835), (5, 4331068), (7, 3093620), (10, 2165534), (14, 1546810), (20, 1082767), (28, 773405), (35, 618724), (70, 309362), (140, 154681)]