21749013

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:207

約数の個数: 64

約数和(自身を含む): 39029760

約数和(自身を除く): 17280747

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 43, 99, 117, 129, 131, 143, 297, 351, 387, 393, 429, 473, 559, 1161, 1179, 1287, 1419, 1441, 1677, 1703, 3537, 3861, 4257, 4323, 5031, 5109, 5633, 6149, 12771, 12969, 15093, 15327, 16899, 18447, 18733, 38907, 45981, 50697, 55341, 56199, 61963, 73229, 152091, 166023, 168597, 185889, 219687, 505791, 557667, 659061, 805519, 1673001, 1977183, 2416557, 7249671, 21749013]

約数ペア:

[(1, 21749013), (3, 7249671), (9, 2416557), (11, 1977183), (13, 1673001), (27, 805519), (33, 659061), (39, 557667), (43, 505791), (99, 219687), (117, 185889), (129, 168597), (131, 166023), (143, 152091), (297, 73229), (351, 61963), (387, 56199), (393, 55341), (429, 50697), (473, 45981), (559, 38907), (1161, 18733), (1179, 18447), (1287, 16899), (1419, 15327), (1441, 15093), (1677, 12969), (1703, 12771), (3537, 6149), (3861, 5633), (4257, 5109), (4323, 5031)]