21178456

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{6569}}^1$

素因数の和:6619

約数の個数: 32

約数和(自身を含む): 44150400

約数和(自身を除く): 22971944

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 62, 104, 124, 248, 403, 806, 1612, 3224, 6569, 13138, 26276, 52552, 85397, 170794, 203639, 341588, 407278, 683176, 814556, 1629112, 2647307, 5294614, 10589228, 21178456]

約数ペア:

[(1, 21178456), (2, 10589228), (4, 5294614), (8, 2647307), (13, 1629112), (26, 814556), (31, 683176), (52, 407278), (62, 341588), (104, 203639), (124, 170794), (248, 85397), (403, 52552), (806, 26276), (1612, 13138), (3224, 6569)]