21775195

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{521}}^1\times {\mathrm{643}}^1$

素因数の和:1182

約数の個数: 16

約数和(自身を含む): 28238112

約数和(自身を除く): 6462917

約数列:

[1, 5, 13, 65, 521, 643, 2605, 3215, 6773, 8359, 33865, 41795, 335003, 1675015, 4355039, 21775195]

約数ペア:

[(1, 21775195), (5, 4355039), (13, 1675015), (65, 335003), (521, 41795), (643, 33865), (2605, 8359), (3215, 6773)]