21142961

素因数分解:

$7^2\times {\mathrm{31}}^2\times {\mathrm{449}}^1$

素因数の和:525

約数の個数: 18

約数和(自身を含む): 25470450

約数和(自身を除く): 4327489

約数列:

[1, 7, 31, 49, 217, 449, 961, 1519, 3143, 6727, 13919, 22001, 47089, 97433, 431489, 682031, 3020423, 21142961]

約数ペア:

[(1, 21142961), (7, 3020423), (31, 682031), (49, 431489), (217, 97433), (449, 47089), (961, 22001), (1519, 13919), (3143, 6727)]