20209007

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{1621}}^1$

素因数の和:1778

約数の個数: 16

約数和(自身を含む): 25069632

約数和(自身を除く): 4860625

約数列:

[1, 7, 13, 91, 137, 959, 1621, 1781, 11347, 12467, 21073, 147511, 222077, 1554539, 2887001, 20209007]

約数ペア:

[(1, 20209007), (7, 2887001), (13, 1554539), (91, 222077), (137, 147511), (959, 21073), (1621, 12467), (1781, 11347)]