19990165

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{577}}^1$

素因数の和:649

約数の個数: 24

約数和(自身を含む): 26655048

約数和(自身を除く): 6664883

約数列:

[1, 5, 13, 41, 65, 169, 205, 533, 577, 845, 2665, 2885, 6929, 7501, 23657, 34645, 37505, 97513, 118285, 307541, 487565, 1537705, 3998033, 19990165]

約数ペア:

[(1, 19990165), (5, 3998033), (13, 1537705), (41, 487565), (65, 307541), (169, 118285), (205, 97513), (533, 37505), (577, 34645), (845, 23657), (2665, 7501), (2885, 6929)]