20801836

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{42979}}^1$

素因数の和:43005

約数の個数: 18

約数和(自身を含む): 40014380

約数和(自身を除く): 19212544

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 42979, 85958, 171916, 472769, 945538, 1891076, 5200459, 10400918, 20801836]

約数ペア:

[(1, 20801836), (2, 10400918), (4, 5200459), (11, 1891076), (22, 945538), (44, 472769), (121, 171916), (242, 85958), (484, 42979)]