20921747

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{1453}}^1$

素因数の和:1499

約数の個数: 24

約数和(自身を含む): 27847008

約数和(自身を除く): 6925261

約数列:

[1, 7, 11, 17, 77, 119, 121, 187, 847, 1309, 1453, 2057, 10171, 14399, 15983, 24701, 111881, 172907, 175813, 271711, 1230691, 1901977, 2988821, 20921747]

約数ペア:

[(1, 20921747), (7, 2988821), (11, 1901977), (17, 1230691), (77, 271711), (119, 175813), (121, 172907), (187, 111881), (847, 24701), (1309, 15983), (1453, 14399), (2057, 10171)]