20812544

素因数分解:

$2^8\times {\mathrm{81299}}^1$

素因数の和:81315

約数の個数: 18

約数和(自身を含む): 41544300

約数和(自身を除く): 20731756

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 256, 81299, 162598, 325196, 650392, 1300784, 2601568, 5203136, 10406272, 20812544]

約数ペア:

[(1, 20812544), (2, 10406272), (4, 5203136), (8, 2601568), (16, 1300784), (32, 650392), (64, 325196), (128, 162598), (256, 81299)]