21200205

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{8363}}^1$

素因数の和:8397

約数の個数: 24

約数和(自身を含む): 36734688

約数和(自身を除く): 15534483

約数列:

[1, 3, 5, 13, 15, 39, 65, 169, 195, 507, 845, 2535, 8363, 25089, 41815, 108719, 125445, 326157, 543595, 1413347, 1630785, 4240041, 7066735, 21200205]

約数ペア:

[(1, 21200205), (3, 7066735), (5, 4240041), (13, 1630785), (15, 1413347), (39, 543595), (65, 326157), (169, 125445), (195, 108719), (507, 41815), (845, 25089), (2535, 8363)]