20913412

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{30937}}^1$

素因数の和:30967

約数の個数: 18

約数和(自身を含む): 39631578

約数和(自身を除く): 18718166

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 30937, 61874, 123748, 402181, 804362, 1608724, 5228353, 10456706, 20913412]

約数ペア:

[(1, 20913412), (2, 10456706), (4, 5228353), (13, 1608724), (26, 804362), (52, 402181), (169, 123748), (338, 61874), (676, 30937)]