81225

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^2$

素因数の和:54

約数の個数: 27

約数和(自身を含む): 153543

約数和(自身を除く): 72318

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 95, 171, 225, 285, 361, 475, 855, 1083, 1425, 1805, 3249, 4275, 5415, 9025, 16245, 27075, 81225]

約数ペア:

[(1, 81225), (3, 27075), (5, 16245), (9, 9025), (15, 5415), (19, 4275), (25, 3249), (45, 1805), (57, 1425), (75, 1083), (95, 855), (171, 475), (225, 361)]