211701609

素因数分解:

$3^2\times 7^2\times {\mathrm{480049}}^1$

素因数の和:480069

約数の個数: 18

約数和(自身を含む): 355717050

約数和(自身を除く): 144015441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 480049, 1440147, 3360343, 4320441, 10081029, 23522401, 30243087, 70567203, 211701609]

約数ペア:

[(1, 211701609), (3, 70567203), (7, 30243087), (9, 23522401), (21, 10081029), (49, 4320441), (63, 3360343), (147, 1440147), (441, 480049)]