81979695

素因数分解:

$3^9\times 5^1\times 7^2\times {\mathrm{17}}^1$

素因数の和:63

約数の個数: 120

約数和(自身を含む): 181749744

約数和(自身を除く): 99770049

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 27, 35, 45, 49, 51, 63, 81, 85, 105, 119, 135, 147, 153, 189, 243, 245, 255, 315, 357, 405, 441, 459, 567, 595, 729, 735, 765, 833, 945, 1071, 1215, 1323, 1377, 1701, 1785, 2187, 2205, 2295, 2499, 2835, 3213, 3645, 3969, 4131, 4165, 5103, 5355, 6561, 6615, 6885, 7497, 8505, 9639, 10935, 11907, 12393, 12495, 15309, 16065, 19683, 19845, 20655, 22491, 25515, 28917, 32805, 35721, 37179, 37485, 45927, 48195, 59535, 61965, 67473, 76545, 86751, 98415, 107163, 111537, 112455, 137781, 144585, 178605, 185895, 202419, 229635, 260253, 321489, 334611, 337365, 433755, 535815, 557685, 607257, 688905, 780759, 964467, 1012095, 1301265, 1607445, 1673055, 1821771, 2342277, 3036285, 3903795, 4822335, 5465313, 9108855, 11711385, 16395939, 27326565, 81979695]

約数ペア:

[(1, 81979695), (3, 27326565), (5, 16395939), (7, 11711385), (9, 9108855), (15, 5465313), (17, 4822335), (21, 3903795), (27, 3036285), (35, 2342277), (45, 1821771), (49, 1673055), (51, 1607445), (63, 1301265), (81, 1012095), (85, 964467), (105, 780759), (119, 688905), (135, 607257), (147, 557685), (153, 535815), (189, 433755), (243, 337365), (245, 334611), (255, 321489), (315, 260253), (357, 229635), (405, 202419), (441, 185895), (459, 178605), (567, 144585), (595, 137781), (729, 112455), (735, 111537), (765, 107163), (833, 98415), (945, 86751), (1071, 76545), (1215, 67473), (1323, 61965), (1377, 59535), (1701, 48195), (1785, 45927), (2187, 37485), (2205, 37179), (2295, 35721), (2499, 32805), (2835, 28917), (3213, 25515), (3645, 22491), (3969, 20655), (4131, 19845), (4165, 19683), (5103, 16065), (5355, 15309), (6561, 12495), (6615, 12393), (6885, 11907), (7497, 10935), (8505, 9639)]