20427960

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{293}}^1$

素因数の和:397

約数の個数: 128

約数和(自身を含む): 71124480

約数和(自身を除く): 50696520

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 83, 84, 105, 120, 140, 166, 168, 210, 249, 280, 293, 332, 415, 420, 498, 581, 586, 664, 830, 840, 879, 996, 1162, 1172, 1245, 1465, 1660, 1743, 1758, 1992, 2051, 2324, 2344, 2490, 2905, 2930, 3320, 3486, 3516, 4102, 4395, 4648, 4980, 5810, 5860, 6153, 6972, 7032, 8204, 8715, 8790, 9960, 10255, 11620, 11720, 12306, 13944, 16408, 17430, 17580, 20510, 23240, 24319, 24612, 30765, 34860, 35160, 41020, 48638, 49224, 61530, 69720, 72957, 82040, 97276, 121595, 123060, 145914, 170233, 194552, 243190, 246120, 291828, 340466, 364785, 486380, 510699, 583656, 680932, 729570, 851165, 972760, 1021398, 1361864, 1459140, 1702330, 2042796, 2553495, 2918280, 3404660, 4085592, 5106990, 6809320, 10213980, 20427960]

約数ペア:

[(1, 20427960), (2, 10213980), (3, 6809320), (4, 5106990), (5, 4085592), (6, 3404660), (7, 2918280), (8, 2553495), (10, 2042796), (12, 1702330), (14, 1459140), (15, 1361864), (20, 1021398), (21, 972760), (24, 851165), (28, 729570), (30, 680932), (35, 583656), (40, 510699), (42, 486380), (56, 364785), (60, 340466), (70, 291828), (83, 246120), (84, 243190), (105, 194552), (120, 170233), (140, 145914), (166, 123060), (168, 121595), (210, 97276), (249, 82040), (280, 72957), (293, 69720), (332, 61530), (415, 49224), (420, 48638), (498, 41020), (581, 35160), (586, 34860), (664, 30765), (830, 24612), (840, 24319), (879, 23240), (996, 20510), (1162, 17580), (1172, 17430), (1245, 16408), (1465, 13944), (1660, 12306), (1743, 11720), (1758, 11620), (1992, 10255), (2051, 9960), (2324, 8790), (2344, 8715), (2490, 8204), (2905, 7032), (2930, 6972), (3320, 6153), (3486, 5860), (3516, 5810), (4102, 4980), (4395, 4648)]