21000891249

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{436727}}^1$

素因数の和:436886

約数の個数: 32

約数和(自身を含む): 33750339840

約数和(自身を除く): 12749448591

約数列:

[1, 3, 9, 13, 27, 39, 117, 137, 351, 411, 1233, 1781, 3699, 5343, 16029, 48087, 436727, 1310181, 3930543, 5677451, 11791629, 17032353, 51097059, 59831599, 153291177, 179494797, 538484391, 777810787, 1615453173, 2333432361, 7000297083, 21000891249]

約数ペア:

[(1, 21000891249), (3, 7000297083), (9, 2333432361), (13, 1615453173), (27, 777810787), (39, 538484391), (117, 179494797), (137, 153291177), (351, 59831599), (411, 51097059), (1233, 17032353), (1781, 11791629), (3699, 5677451), (5343, 3930543), (16029, 1310181), (48087, 436727)]