20916440

素因数分解:

$2^3\times 5^1\times {\mathrm{569}}^1\times {\mathrm{919}}^1$

素因数の和:1499

約数の個数: 32

約数和(自身を含む): 47196000

約数和(自身を除く): 26279560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 569, 919, 1138, 1838, 2276, 2845, 3676, 4552, 4595, 5690, 7352, 9190, 11380, 18380, 22760, 36760, 522911, 1045822, 2091644, 2614555, 4183288, 5229110, 10458220, 20916440]

約数ペア:

[(1, 20916440), (2, 10458220), (4, 5229110), (5, 4183288), (8, 2614555), (10, 2091644), (20, 1045822), (40, 522911), (569, 36760), (919, 22760), (1138, 18380), (1838, 11380), (2276, 9190), (2845, 7352), (3676, 5690), (4552, 4595)]