21898180

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{25463}}^1$

素因数の和:25515

約数の個数: 24

約数和(自身を含む): 47057472

約数和(自身を除く): 25159292

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 25463, 50926, 101852, 127315, 254630, 509260, 1094909, 2189818, 4379636, 5474545, 10949090, 21898180]

約数ペア:

[(1, 21898180), (2, 10949090), (4, 5474545), (5, 4379636), (10, 2189818), (20, 1094909), (43, 509260), (86, 254630), (172, 127315), (215, 101852), (430, 50926), (860, 25463)]