81668920

素因数分解:

$2^3\times 5^1\times {\mathrm{937}}^1\times {\mathrm{2179}}^1$

素因数の和:3127

約数の個数: 32

約数和(自身を含む): 184035600

約数和(自身を除く): 102366680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 937, 1874, 2179, 3748, 4358, 4685, 7496, 8716, 9370, 10895, 17432, 18740, 21790, 37480, 43580, 87160, 2041723, 4083446, 8166892, 10208615, 16333784, 20417230, 40834460, 81668920]

約数ペア:

[(1, 81668920), (2, 40834460), (4, 20417230), (5, 16333784), (8, 10208615), (10, 8166892), (20, 4083446), (40, 2041723), (937, 87160), (1874, 43580), (2179, 37480), (3748, 21790), (4358, 18740), (4685, 17432), (7496, 10895), (8716, 9370)]