21986816

素因数分解:

$2^9\times {\mathrm{42943}}^1$

素因数の和:42961

約数の個数: 20

約数和(自身を含む): 43931712

約数和(自身を除く): 21944896

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 42943, 85886, 171772, 343544, 687088, 1374176, 2748352, 5496704, 10993408, 21986816]

約数ペア:

[(1, 21986816), (2, 10993408), (4, 5496704), (8, 2748352), (16, 1374176), (32, 687088), (64, 343544), (128, 171772), (256, 85886), (512, 42943)]