20401084

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{691}}^1$

素因数の和:778

約数の個数: 36

約数和(自身を含む): 39943624

約数和(自身を除く): 19542540

約数列:

[1, 2, 4, 11, 22, 44, 61, 121, 122, 242, 244, 484, 671, 691, 1342, 1382, 2684, 2764, 7381, 7601, 14762, 15202, 29524, 30404, 42151, 83611, 84302, 167222, 168604, 334444, 463661, 927322, 1854644, 5100271, 10200542, 20401084]

約数ペア:

[(1, 20401084), (2, 10200542), (4, 5100271), (11, 1854644), (22, 927322), (44, 463661), (61, 334444), (121, 168604), (122, 167222), (242, 84302), (244, 83611), (484, 42151), (671, 30404), (691, 29524), (1342, 15202), (1382, 14762), (2684, 7601), (2764, 7381)]