21053445

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{4663}}^1$

素因数の和:4721

約数の個数: 32

約数和(自身を含む): 39401472

約数和(自身を除く): 18348027

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 105, 129, 215, 301, 645, 903, 1505, 4515, 4663, 13989, 23315, 32641, 69945, 97923, 163205, 200509, 489615, 601527, 1002545, 1403563, 3007635, 4210689, 7017815, 21053445]

約数ペア:

[(1, 21053445), (3, 7017815), (5, 4210689), (7, 3007635), (15, 1403563), (21, 1002545), (35, 601527), (43, 489615), (105, 200509), (129, 163205), (215, 97923), (301, 69945), (645, 32641), (903, 23315), (1505, 13989), (4515, 4663)]