28641275

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{6779}}^1$

素因数の和:6815

約数の個数: 18

約数和(自身を含む): 38462940

約数和(自身を除く): 9821665

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 6779, 33895, 88127, 169475, 440635, 1145651, 2203175, 5728255, 28641275]

約数ペア:

[(1, 28641275), (5, 5728255), (13, 2203175), (25, 1145651), (65, 440635), (169, 169475), (325, 88127), (845, 33895), (4225, 6779)]