21811321

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{173}}^1$

素因数の和:301

約数の個数: 24

約数和(自身を含む): 26659584

約数和(自身を除く): 4848263

約数列:

[1, 7, 31, 49, 83, 173, 217, 581, 1211, 1519, 2573, 4067, 5363, 8477, 14359, 18011, 37541, 100513, 126077, 262787, 445129, 703591, 3115903, 21811321]

約数ペア:

[(1, 21811321), (7, 3115903), (31, 703591), (49, 445129), (83, 262787), (173, 126077), (217, 100513), (581, 37541), (1211, 18011), (1519, 14359), (2573, 8477), (4067, 5363)]