21781620

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{293}}^1$

素因数の和:374

約数の個数: 144

約数和(自身を含む): 77051520

約数和(自身を除く): 55269900

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 59, 60, 63, 70, 84, 90, 105, 118, 126, 140, 177, 180, 210, 236, 252, 293, 295, 315, 354, 413, 420, 531, 586, 590, 630, 708, 826, 879, 885, 1062, 1172, 1180, 1239, 1260, 1465, 1652, 1758, 1770, 2051, 2065, 2124, 2478, 2637, 2655, 2930, 3516, 3540, 3717, 4102, 4130, 4395, 4956, 5274, 5310, 5860, 6153, 6195, 7434, 8204, 8260, 8790, 10255, 10548, 10620, 12306, 12390, 13185, 14868, 17287, 17580, 18459, 18585, 20510, 24612, 24780, 26370, 30765, 34574, 36918, 37170, 41020, 51861, 52740, 61530, 69148, 73836, 74340, 86435, 92295, 103722, 121009, 123060, 155583, 172870, 184590, 207444, 242018, 259305, 311166, 345740, 363027, 369180, 484036, 518610, 605045, 622332, 726054, 777915, 1037220, 1089081, 1210090, 1452108, 1555830, 1815135, 2178162, 2420180, 3111660, 3630270, 4356324, 5445405, 7260540, 10890810, 21781620]

約数ペア:

[(1, 21781620), (2, 10890810), (3, 7260540), (4, 5445405), (5, 4356324), (6, 3630270), (7, 3111660), (9, 2420180), (10, 2178162), (12, 1815135), (14, 1555830), (15, 1452108), (18, 1210090), (20, 1089081), (21, 1037220), (28, 777915), (30, 726054), (35, 622332), (36, 605045), (42, 518610), (45, 484036), (59, 369180), (60, 363027), (63, 345740), (70, 311166), (84, 259305), (90, 242018), (105, 207444), (118, 184590), (126, 172870), (140, 155583), (177, 123060), (180, 121009), (210, 103722), (236, 92295), (252, 86435), (293, 74340), (295, 73836), (315, 69148), (354, 61530), (413, 52740), (420, 51861), (531, 41020), (586, 37170), (590, 36918), (630, 34574), (708, 30765), (826, 26370), (879, 24780), (885, 24612), (1062, 20510), (1172, 18585), (1180, 18459), (1239, 17580), (1260, 17287), (1465, 14868), (1652, 13185), (1758, 12390), (1770, 12306), (2051, 10620), (2065, 10548), (2124, 10255), (2478, 8790), (2637, 8260), (2655, 8204), (2930, 7434), (3516, 6195), (3540, 6153), (3717, 5860), (4102, 5310), (4130, 5274), (4395, 4956)]