21088145

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^2\times {\mathrm{193}}^1$

素因数の和:293

約数の個数: 24

約数和(自身を含む): 28078008

約数和(自身を除く): 6989863

約数列:

[1, 5, 13, 41, 65, 193, 205, 533, 965, 1681, 2509, 2665, 7913, 8405, 12545, 21853, 39565, 102869, 109265, 324433, 514345, 1622165, 4217629, 21088145]

約数ペア:

[(1, 21088145), (5, 4217629), (13, 1622165), (41, 514345), (65, 324433), (193, 109265), (205, 102869), (533, 39565), (965, 21853), (1681, 12545), (2509, 8405), (2665, 7913)]