21057080

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47857}}^1$

素因数の和:47879

約数の個数: 32

約数和(自身を含む): 51686640

約数和(自身を除く): 30629560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47857, 95714, 191428, 239285, 382856, 478570, 526427, 957140, 1052854, 1914280, 2105708, 2632135, 4211416, 5264270, 10528540, 21057080]

約数ペア:

[(1, 21057080), (2, 10528540), (4, 5264270), (5, 4211416), (8, 2632135), (10, 2105708), (11, 1914280), (20, 1052854), (22, 957140), (40, 526427), (44, 478570), (55, 382856), (88, 239285), (110, 191428), (220, 95714), (440, 47857)]