21991508

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{6491}}^1$

素因数の和:6524

約数の個数: 36

約数和(自身を含む): 48352416

約数和(自身を除く): 26360908

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 121, 154, 242, 308, 484, 847, 1694, 3388, 6491, 12982, 25964, 45437, 71401, 90874, 142802, 181748, 285604, 499807, 785411, 999614, 1570822, 1999228, 3141644, 5497877, 10995754, 21991508]

約数ペア:

[(1, 21991508), (2, 10995754), (4, 5497877), (7, 3141644), (11, 1999228), (14, 1570822), (22, 999614), (28, 785411), (44, 499807), (77, 285604), (121, 181748), (154, 142802), (242, 90874), (308, 71401), (484, 45437), (847, 25964), (1694, 12982), (3388, 6491)]