21257145

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{179}}^1$

素因数の和:239

約数の個数: 96

約数和(自身を含む): 47174400

約数和(自身を除く): 25917255

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 29, 35, 39, 45, 63, 65, 87, 91, 105, 117, 145, 179, 195, 203, 261, 273, 315, 377, 435, 455, 537, 585, 609, 819, 895, 1015, 1131, 1253, 1305, 1365, 1611, 1827, 1885, 2327, 2639, 2685, 3045, 3393, 3759, 4095, 5191, 5655, 6265, 6981, 7917, 8055, 9135, 11277, 11635, 13195, 15573, 16289, 16965, 18795, 20943, 23751, 25955, 34905, 36337, 39585, 46719, 48867, 56385, 67483, 77865, 81445, 104715, 109011, 118755, 146601, 181685, 202449, 233595, 244335, 327033, 337415, 472381, 545055, 607347, 733005, 1012245, 1417143, 1635165, 2361905, 3036735, 4251429, 7085715, 21257145]

約数ペア:

[(1, 21257145), (3, 7085715), (5, 4251429), (7, 3036735), (9, 2361905), (13, 1635165), (15, 1417143), (21, 1012245), (29, 733005), (35, 607347), (39, 545055), (45, 472381), (63, 337415), (65, 327033), (87, 244335), (91, 233595), (105, 202449), (117, 181685), (145, 146601), (179, 118755), (195, 109011), (203, 104715), (261, 81445), (273, 77865), (315, 67483), (377, 56385), (435, 48867), (455, 46719), (537, 39585), (585, 36337), (609, 34905), (819, 25955), (895, 23751), (1015, 20943), (1131, 18795), (1253, 16965), (1305, 16289), (1365, 15573), (1611, 13195), (1827, 11635), (1885, 11277), (2327, 9135), (2639, 8055), (2685, 7917), (3045, 6981), (3393, 6265), (3759, 5655), (4095, 5191)]