20518680

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1879}}^1$

素因数の和:1913

約数の個数: 128

約数和(自身を含む): 75801600

約数和(自身を除く): 55282920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 52, 56, 60, 65, 70, 78, 84, 91, 104, 105, 120, 130, 140, 156, 168, 182, 195, 210, 260, 273, 280, 312, 364, 390, 420, 455, 520, 546, 728, 780, 840, 910, 1092, 1365, 1560, 1820, 1879, 2184, 2730, 3640, 3758, 5460, 5637, 7516, 9395, 10920, 11274, 13153, 15032, 18790, 22548, 24427, 26306, 28185, 37580, 39459, 45096, 48854, 52612, 56370, 65765, 73281, 75160, 78918, 97708, 105224, 112740, 122135, 131530, 146562, 157836, 170989, 195416, 197295, 225480, 244270, 263060, 293124, 315672, 341978, 366405, 394590, 488540, 512967, 526120, 586248, 683956, 732810, 789180, 854945, 977080, 1025934, 1367912, 1465620, 1578360, 1709890, 2051868, 2564835, 2931240, 3419780, 4103736, 5129670, 6839560, 10259340, 20518680]

約数ペア:

[(1, 20518680), (2, 10259340), (3, 6839560), (4, 5129670), (5, 4103736), (6, 3419780), (7, 2931240), (8, 2564835), (10, 2051868), (12, 1709890), (13, 1578360), (14, 1465620), (15, 1367912), (20, 1025934), (21, 977080), (24, 854945), (26, 789180), (28, 732810), (30, 683956), (35, 586248), (39, 526120), (40, 512967), (42, 488540), (52, 394590), (56, 366405), (60, 341978), (65, 315672), (70, 293124), (78, 263060), (84, 244270), (91, 225480), (104, 197295), (105, 195416), (120, 170989), (130, 157836), (140, 146562), (156, 131530), (168, 122135), (182, 112740), (195, 105224), (210, 97708), (260, 78918), (273, 75160), (280, 73281), (312, 65765), (364, 56370), (390, 52612), (420, 48854), (455, 45096), (520, 39459), (546, 37580), (728, 28185), (780, 26306), (840, 24427), (910, 22548), (1092, 18790), (1365, 15032), (1560, 13153), (1820, 11274), (1879, 10920), (2184, 9395), (2730, 7516), (3640, 5637), (3758, 5460)]