20917728

素因数分解:

$2^5\times 3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{151}}^1$

素因数の和:217

約数の個数: 144

約数和(自身を含む): 66227616

約数和(自身を除く): 45309888

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 32, 36, 37, 39, 48, 52, 72, 74, 78, 96, 104, 111, 117, 144, 148, 151, 156, 208, 222, 234, 288, 296, 302, 312, 333, 416, 444, 453, 468, 481, 592, 604, 624, 666, 888, 906, 936, 962, 1184, 1208, 1248, 1332, 1359, 1443, 1776, 1812, 1872, 1924, 1963, 2416, 2664, 2718, 2886, 3552, 3624, 3744, 3848, 3926, 4329, 4832, 5328, 5436, 5587, 5772, 5889, 7248, 7696, 7852, 8658, 10656, 10872, 11174, 11544, 11778, 14496, 15392, 15704, 16761, 17316, 17667, 21744, 22348, 23088, 23556, 31408, 33522, 34632, 35334, 43488, 44696, 46176, 47112, 50283, 62816, 67044, 69264, 70668, 72631, 89392, 94224, 100566, 134088, 138528, 141336, 145262, 178784, 188448, 201132, 217893, 268176, 282672, 290524, 402264, 435786, 536352, 565344, 581048, 653679, 804528, 871572, 1162096, 1307358, 1609056, 1743144, 2324192, 2614716, 3486288, 5229432, 6972576, 10458864, 20917728]

約数ペア:

[(1, 20917728), (2, 10458864), (3, 6972576), (4, 5229432), (6, 3486288), (8, 2614716), (9, 2324192), (12, 1743144), (13, 1609056), (16, 1307358), (18, 1162096), (24, 871572), (26, 804528), (32, 653679), (36, 581048), (37, 565344), (39, 536352), (48, 435786), (52, 402264), (72, 290524), (74, 282672), (78, 268176), (96, 217893), (104, 201132), (111, 188448), (117, 178784), (144, 145262), (148, 141336), (151, 138528), (156, 134088), (208, 100566), (222, 94224), (234, 89392), (288, 72631), (296, 70668), (302, 69264), (312, 67044), (333, 62816), (416, 50283), (444, 47112), (453, 46176), (468, 44696), (481, 43488), (592, 35334), (604, 34632), (624, 33522), (666, 31408), (888, 23556), (906, 23088), (936, 22348), (962, 21744), (1184, 17667), (1208, 17316), (1248, 16761), (1332, 15704), (1359, 15392), (1443, 14496), (1776, 11778), (1812, 11544), (1872, 11174), (1924, 10872), (1963, 10656), (2416, 8658), (2664, 7852), (2718, 7696), (2886, 7248), (3552, 5889), (3624, 5772), (3744, 5587), (3848, 5436), (3926, 5328), (4329, 4832)]