21452571

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{7919}}^1$

素因数の和:7975

約数の個数: 24

約数和(自身を含む): 36241920

約数和(自身を除く): 14789349

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 7919, 23757, 55433, 71271, 166299, 340517, 498897, 1021551, 2383619, 3064653, 7150857, 21452571]

約数ペア:

[(1, 21452571), (3, 7150857), (7, 3064653), (9, 2383619), (21, 1021551), (43, 498897), (63, 340517), (129, 166299), (301, 71271), (387, 55433), (903, 23757), (2709, 7919)]