21281535

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{281}}^1$

素因数の和:326

約数の個数: 80

約数和(自身を含む): 44222112

約数和(自身を除く): 22940577

約数列:

[1, 3, 5, 9, 11, 15, 17, 27, 33, 45, 51, 55, 81, 85, 99, 135, 153, 165, 187, 255, 281, 297, 405, 459, 495, 561, 765, 843, 891, 935, 1377, 1405, 1485, 1683, 2295, 2529, 2805, 3091, 4215, 4455, 4777, 5049, 6885, 7587, 8415, 9273, 12645, 14331, 15147, 15455, 22761, 23885, 25245, 27819, 37935, 42993, 46365, 52547, 71655, 75735, 83457, 113805, 128979, 139095, 157641, 214965, 250371, 262735, 386937, 417285, 472923, 644895, 788205, 1251855, 1418769, 1934685, 2364615, 4256307, 7093845, 21281535]

約数ペア:

[(1, 21281535), (3, 7093845), (5, 4256307), (9, 2364615), (11, 1934685), (15, 1418769), (17, 1251855), (27, 788205), (33, 644895), (45, 472923), (51, 417285), (55, 386937), (81, 262735), (85, 250371), (99, 214965), (135, 157641), (153, 139095), (165, 128979), (187, 113805), (255, 83457), (281, 75735), (297, 71655), (405, 52547), (459, 46365), (495, 42993), (561, 37935), (765, 27819), (843, 25245), (891, 23885), (935, 22761), (1377, 15455), (1405, 15147), (1485, 14331), (1683, 12645), (2295, 9273), (2529, 8415), (2805, 7587), (3091, 6885), (4215, 5049), (4455, 4777)]