21000638907

素因数分解:

$3^4\times {\mathrm{3923}}^1\times {\mathrm{66089}}^1$

素因数の和:70024

約数の個数: 20

約数和(自身を含む): 31379796360

約数和(自身を除く): 10379157453

約数列:

[1, 3, 9, 27, 81, 3923, 11769, 35307, 66089, 105921, 198267, 317763, 594801, 1784403, 5353209, 259267147, 777801441, 2333404323, 7000212969, 21000638907]

約数ペア:

[(1, 21000638907), (3, 7000212969), (9, 2333404323), (27, 777801441), (81, 259267147), (3923, 5353209), (11769, 1784403), (35307, 594801), (66089, 317763), (105921, 198267)]