21227756

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{719}}^1$

素因数の和:806

約数の個数: 36

約数和(自身を含む): 41559840

約数和(自身を除く): 20332084

約数列:

[1, 2, 4, 11, 22, 44, 61, 121, 122, 242, 244, 484, 671, 719, 1342, 1438, 2684, 2876, 7381, 7909, 14762, 15818, 29524, 31636, 43859, 86999, 87718, 173998, 175436, 347996, 482449, 964898, 1929796, 5306939, 10613878, 21227756]

約数ペア:

[(1, 21227756), (2, 10613878), (4, 5306939), (11, 1929796), (22, 964898), (44, 482449), (61, 347996), (121, 175436), (122, 173998), (242, 87718), (244, 86999), (484, 43859), (671, 31636), (719, 29524), (1342, 15818), (1438, 14762), (2684, 7909), (2876, 7381)]