21040412

素因数分解:

$2^2\times {\mathrm{67}}^1\times {\mathrm{78509}}^1$

素因数の和:78580

約数の個数: 12

約数和(自身を含む): 37370760

約数和(自身を除く): 16330348

約数列:

[1, 2, 4, 67, 134, 268, 78509, 157018, 314036, 5260103, 10520206, 21040412]

約数ペア:

[(1, 21040412), (2, 10520206), (4, 5260103), (67, 314036), (134, 157018), (268, 78509)]