20972809

素因数分解:

${\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{199}}^1$

素因数の和:301

約数の個数: 24

約数和(自身を含む): 25323200

約数和(自身を除く): 4350391

約数列:

[1, 11, 13, 67, 121, 143, 199, 737, 871, 1573, 2189, 2587, 8107, 9581, 13333, 24079, 28457, 105391, 146663, 173329, 313027, 1613293, 1906619, 20972809]

約数ペア:

[(1, 20972809), (11, 1906619), (13, 1613293), (67, 313027), (121, 173329), (143, 146663), (199, 105391), (737, 28457), (871, 24079), (1573, 13333), (2189, 9581), (2587, 8107)]