20816988

素因数分解:

$2^2\times 3^1\times {\mathrm{43}}^1\times {\mathrm{40343}}^1$

素因数の和:40393

約数の個数: 24

約数和(自身を含む): 49703808

約数和(自身を除く): 28886820

約数列:

[1, 2, 3, 4, 6, 12, 43, 86, 129, 172, 258, 516, 40343, 80686, 121029, 161372, 242058, 484116, 1734749, 3469498, 5204247, 6938996, 10408494, 20816988]

約数ペア:

[(1, 20816988), (2, 10408494), (3, 6938996), (4, 5204247), (6, 3469498), (12, 1734749), (43, 484116), (86, 242058), (129, 161372), (172, 121029), (258, 80686), (516, 40343)]