20307898

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{9887}}^1$

素因数の和:9981

約数の個数: 16

約数和(自身を含む): 33223680

約数和(自身を除く): 12915782

約数列:

[1, 2, 13, 26, 79, 158, 1027, 2054, 9887, 19774, 128531, 257062, 781073, 1562146, 10153949, 20307898]

約数ペア:

[(1, 20307898), (2, 10153949), (13, 1562146), (26, 781073), (79, 257062), (158, 128531), (1027, 19774), (2054, 9887)]