21340475

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{5051}}^1$

素因数の和:5087

約数の個数: 18

約数和(自身を含む): 28659996

約数和(自身を除く): 7319521

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 5051, 25255, 65663, 126275, 328315, 853619, 1641575, 4268095, 21340475]

約数ペア:

[(1, 21340475), (5, 4268095), (13, 1641575), (25, 853619), (65, 328315), (169, 126275), (325, 65663), (845, 25255), (4225, 5051)]