981640225

素因数分解:

$5^2\times {\mathrm{19}}^2\times {\mathrm{108769}}^1$

素因数の和:108817

約数の個数: 18

約数和(自身を含む): 1284682470

約数和(自身を除く): 303042245

約数列:

[1, 5, 19, 25, 95, 361, 475, 1805, 9025, 108769, 543845, 2066611, 2719225, 10333055, 39265609, 51665275, 196328045, 981640225]

約数ペア:

[(1, 981640225), (5, 196328045), (19, 51665275), (25, 39265609), (95, 10333055), (361, 2719225), (475, 2066611), (1805, 543845), (9025, 108769)]