21122380

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25759}}^1$

素因数の和:25809

約数の個数: 24

約数和(自身を含む): 45440640

約数和(自身を除く): 24318260

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25759, 51518, 103036, 128795, 257590, 515180, 1056119, 2112238, 4224476, 5280595, 10561190, 21122380]

約数ペア:

[(1, 21122380), (2, 10561190), (4, 5280595), (5, 4224476), (10, 2112238), (20, 1056119), (41, 515180), (82, 257590), (164, 128795), (205, 103036), (410, 51518), (820, 25759)]