21004555

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1013}}^1$

素因数の和:1071

約数の個数: 32

約数和(自身を含む): 30663360

約数和(自身を除く): 9658805

約数列:

[1, 5, 11, 13, 29, 55, 65, 143, 145, 319, 377, 715, 1013, 1595, 1885, 4147, 5065, 11143, 13169, 20735, 29377, 55715, 65845, 144859, 146885, 323147, 381901, 724295, 1615735, 1909505, 4200911, 21004555]

約数ペア:

[(1, 21004555), (5, 4200911), (11, 1909505), (13, 1615735), (29, 724295), (55, 381901), (65, 323147), (143, 146885), (145, 144859), (319, 65845), (377, 55715), (715, 29377), (1013, 20735), (1595, 13169), (1885, 11143), (4147, 5065)]