20956999

素因数分解:

$7^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1\times {\mathrm{283}}^1$

素因数の和:510

約数の個数: 16

約数和(自身を含む): 24537600

約数和(自身を除く): 3580601

約数列:

[1, 7, 71, 149, 283, 497, 1043, 1981, 10579, 20093, 42167, 74053, 140651, 295169, 2993857, 20956999]

約数ペア:

[(1, 20956999), (7, 2993857), (71, 295169), (149, 140651), (283, 74053), (497, 42167), (1043, 20093), (1981, 10579)]