18071180

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{21013}}^1$

素因数の和:21065

約数の個数: 24

約数和(自身を含む): 38833872

約数和(自身を除く): 20762692

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 21013, 42026, 84052, 105065, 210130, 420260, 903559, 1807118, 3614236, 4517795, 9035590, 18071180]

約数ペア:

[(1, 18071180), (2, 9035590), (4, 4517795), (5, 3614236), (10, 1807118), (20, 903559), (43, 420260), (86, 210130), (172, 105065), (215, 84052), (430, 42026), (860, 21013)]