21001090

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{2689}}^1$

素因数の和:2778

約数の個数: 32

約数和(自身を含む): 41834880

約数和(自身を除く): 20833790

約数列:

[1, 2, 5, 10, 11, 22, 55, 71, 110, 142, 355, 710, 781, 1562, 2689, 3905, 5378, 7810, 13445, 26890, 29579, 59158, 147895, 190919, 295790, 381838, 954595, 1909190, 2100109, 4200218, 10500545, 21001090]

約数ペア:

[(1, 21001090), (2, 10500545), (5, 4200218), (10, 2100109), (11, 1909190), (22, 954595), (55, 381838), (71, 295790), (110, 190919), (142, 147895), (355, 59158), (710, 29579), (781, 26890), (1562, 13445), (2689, 7810), (3905, 5378)]