20801864

素因数分解:

$2^3\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{691}}^1$

素因数の和:821

約数の個数: 32

約数和(自身を含む): 40357440

約数和(自身を除く): 19555576

約数列:

[1, 2, 4, 8, 53, 71, 106, 142, 212, 284, 424, 568, 691, 1382, 2764, 3763, 5528, 7526, 15052, 30104, 36623, 49061, 73246, 98122, 146492, 196244, 292984, 392488, 2600233, 5200466, 10400932, 20801864]

約数ペア:

[(1, 20801864), (2, 10400932), (4, 5200466), (8, 2600233), (53, 392488), (71, 292984), (106, 196244), (142, 146492), (212, 98122), (284, 73246), (424, 49061), (568, 36623), (691, 30104), (1382, 15052), (2764, 7526), (3763, 5528)]