19977265

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2731}}^1$

素因数の和:2773

約数の個数: 32

約数和(自身を含む): 31472640

約数和(自身を除く): 11495375

約数列:

[1, 5, 7, 11, 19, 35, 55, 77, 95, 133, 209, 385, 665, 1045, 1463, 2731, 7315, 13655, 19117, 30041, 51889, 95585, 150205, 210287, 259445, 363223, 570779, 1051435, 1816115, 2853895, 3995453, 19977265]

約数ペア:

[(1, 19977265), (5, 3995453), (7, 2853895), (11, 1816115), (19, 1051435), (35, 570779), (55, 363223), (77, 259445), (95, 210287), (133, 150205), (209, 95585), (385, 51889), (665, 30041), (1045, 19117), (1463, 13655), (2731, 7315)]