20868705

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1$

素因数の和:108

約数の個数: 128

約数和(自身を含む): 46448640

約数和(自身を除く): 25579935

約数列:

[1, 3, 5, 9, 11, 13, 15, 23, 27, 33, 39, 45, 47, 55, 65, 69, 99, 115, 117, 135, 141, 143, 165, 195, 207, 235, 253, 297, 299, 345, 351, 423, 429, 495, 517, 585, 611, 621, 705, 715, 759, 897, 1035, 1081, 1265, 1269, 1287, 1485, 1495, 1551, 1755, 1833, 2115, 2145, 2277, 2585, 2691, 3055, 3105, 3243, 3289, 3795, 3861, 4485, 4653, 5405, 5499, 6345, 6435, 6721, 6831, 7755, 8073, 9165, 9729, 9867, 11385, 11891, 13455, 13959, 14053, 16215, 16445, 16497, 19305, 20163, 23265, 27495, 29187, 29601, 33605, 34155, 35673, 40365, 42159, 48645, 49335, 59455, 60489, 69795, 70265, 82485, 88803, 100815, 107019, 126477, 145935, 148005, 154583, 178365, 181467, 210795, 302445, 321057, 379431, 444015, 463749, 535095, 632385, 772915, 907335, 1391247, 1605285, 1897155, 2318745, 4173741, 6956235, 20868705]

約数ペア:

[(1, 20868705), (3, 6956235), (5, 4173741), (9, 2318745), (11, 1897155), (13, 1605285), (15, 1391247), (23, 907335), (27, 772915), (33, 632385), (39, 535095), (45, 463749), (47, 444015), (55, 379431), (65, 321057), (69, 302445), (99, 210795), (115, 181467), (117, 178365), (135, 154583), (141, 148005), (143, 145935), (165, 126477), (195, 107019), (207, 100815), (235, 88803), (253, 82485), (297, 70265), (299, 69795), (345, 60489), (351, 59455), (423, 49335), (429, 48645), (495, 42159), (517, 40365), (585, 35673), (611, 34155), (621, 33605), (705, 29601), (715, 29187), (759, 27495), (897, 23265), (1035, 20163), (1081, 19305), (1265, 16497), (1269, 16445), (1287, 16215), (1485, 14053), (1495, 13959), (1551, 13455), (1755, 11891), (1833, 11385), (2115, 9867), (2145, 9729), (2277, 9165), (2585, 8073), (2691, 7755), (3055, 6831), (3105, 6721), (3243, 6435), (3289, 6345), (3795, 5499), (3861, 5405), (4485, 4653)]