21015267

素因数分解:

$3^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{1571}}^1$

素因数の和:1608

約数の個数: 32

約数和(自身を含む): 35212800

約数和(自身を除く): 14197533

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 343, 637, 1029, 1571, 1911, 4459, 4713, 10997, 13377, 20423, 32991, 61269, 76979, 142961, 230937, 428883, 538853, 1000727, 1616559, 3002181, 7005089, 21015267]

約数ペア:

[(1, 21015267), (3, 7005089), (7, 3002181), (13, 1616559), (21, 1000727), (39, 538853), (49, 428883), (91, 230937), (147, 142961), (273, 76979), (343, 61269), (637, 32991), (1029, 20423), (1571, 13377), (1911, 10997), (4459, 4713)]