18711020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{21757}}^1$

素因数の和:21809

約数の個数: 24

約数和(自身を含む): 40208784

約数和(自身を除く): 21497764

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 21757, 43514, 87028, 108785, 217570, 435140, 935551, 1871102, 3742204, 4677755, 9355510, 18711020]

約数ペア:

[(1, 18711020), (2, 9355510), (4, 4677755), (5, 3742204), (10, 1871102), (20, 935551), (43, 435140), (86, 217570), (172, 108785), (215, 87028), (430, 43514), (860, 21757)]